WEBVTT 00:00:00.000 --> 00:00:01.860 I want you to do something for me right now. 00:00:02.100 --> 00:00:05.879 Oh, jumping right in. Yeah. If you are sitting 00:00:05.879 --> 00:00:09.099 at a computer, look down at your keyboard. Or, 00:00:09.099 --> 00:00:10.720 you know, if you're holding a smartphone, just 00:00:10.720 --> 00:00:12.300 pull up your digital keyboard and look at the 00:00:12.300 --> 00:00:15.060 screen. Exactly. Find the 12th letter of the 00:00:15.060 --> 00:00:19.440 alphabet. The letter L. Right. It seems incredibly 00:00:19.440 --> 00:00:21.600 basic, doesn't it? It really does. I mean, it's 00:00:21.600 --> 00:00:25.089 quite literally just a vertical line. Yeah. Maybe 00:00:25.089 --> 00:00:26.949 it has a short horizontal line at the bottom, 00:00:27.010 --> 00:00:29.170 if you're looking at the uppercase version. But 00:00:29.170 --> 00:00:32.570 today's deep dive is going to completely shift 00:00:32.570 --> 00:00:35.090 your perspective on that single keystroke. It 00:00:35.090 --> 00:00:37.719 absolutely will. We are unpacking. the hidden 00:00:37.719 --> 00:00:40.539 history, the typography of the letter L, its 00:00:40.539 --> 00:00:43.439 complex phonetics, and its global quirks. And 00:00:43.439 --> 00:00:45.700 our mission for this deep dive is to uncover 00:00:45.700 --> 00:00:48.939 what connects an ancient agricultural tool, the 00:00:48.939 --> 00:00:52.240 British pound sterling, and your literal physical 00:00:52.240 --> 00:00:55.679 ability to pronounce the word milk. It's just 00:00:55.679 --> 00:00:58.780 wild. It is remarkable progression. For this 00:00:58.780 --> 00:01:00.840 deep dive, we are synthesizing the information 00:01:00.840 --> 00:01:04.980 from the Wikipedia page for the letter L. Spending 00:01:04.980 --> 00:01:07.379 this much time analyzing a single character might 00:01:07.379 --> 00:01:10.200 seem unusually granular to some people. A bit 00:01:10.200 --> 00:01:13.159 niche, maybe? Exactly. But we have to remember 00:01:13.159 --> 00:01:16.219 that the alphabet is arguably one of humanity's 00:01:16.219 --> 00:01:18.900 most critical technologies. Oh, absolutely. By 00:01:18.900 --> 00:01:21.420 isolating and examining just this one component 00:01:21.420 --> 00:01:24.260 of the alphabet's history, we reveal a tremendous 00:01:24.260 --> 00:01:26.760 amount about how human communication has evolved 00:01:26.760 --> 00:01:29.680 over millennia. Yeah. It serves as a perfect 00:01:29.680 --> 00:01:32.219 lens for examining our history, our engineering 00:01:32.219 --> 00:01:35.280 solutions and typography, and even the biological 00:01:35.280 --> 00:01:38.060 mechanics of our linguistics. Okay, let's unpack 00:01:38.060 --> 00:01:40.299 this. starting with the surprisingly physical, 00:01:40.599 --> 00:01:43.459 tangible history of the letter itself. The origin 00:01:43.459 --> 00:01:46.319 story. Right. This vertical line is not just 00:01:46.319 --> 00:01:48.540 some abstract shape that an ancient scribe invented 00:01:48.540 --> 00:01:50.840 out of thin air. No, not at all. We can trace 00:01:50.840 --> 00:01:53.219 its lineage all the way back to an Egyptian hieroglyph. 00:01:53.299 --> 00:01:55.459 Which is fascinating on its own. From there, 00:01:55.519 --> 00:01:57.799 it was adapted into the early Semitic alphabets, 00:01:57.879 --> 00:02:00.480 evolving into the Phoenician letter called Lamed. 00:02:00.640 --> 00:02:03.879 Lamed. Yeah. Then, as trade routes expanded, 00:02:04.140 --> 00:02:06.459 it crossed cultures to become the Western Greek 00:02:06.459 --> 00:02:08.900 Lambda. Right, which looks like an inverted V. 00:02:09.060 --> 00:02:12.020 Exactly. And that morphed again into the Etruscan 00:02:12.020 --> 00:02:15.219 L before finally settling into the Latin L that 00:02:15.219 --> 00:02:17.560 we use across so many modern languages today. 00:02:17.949 --> 00:02:20.650 that is a continuous evolutionary journey spanning 00:02:20.650 --> 00:02:24.550 roughly from 700 bce to the present day it's 00:02:24.550 --> 00:02:27.009 an incredible timeline and what makes that early 00:02:27.009 --> 00:02:30.250 phoenician lamed so captivating is its visual 00:02:30.250 --> 00:02:32.870 origin the actual shape of it right the symbol 00:02:32.870 --> 00:02:35.229 didn't start as a phonetic marker representing 00:02:35.229 --> 00:02:38.650 a sound it began as a pictogram it was a literal 00:02:38.650 --> 00:02:41.949 drawing exactly lamed likely originated as a 00:02:41.949 --> 00:02:44.789 visual representation of a very specific physical 00:02:44.789 --> 00:02:47.030 tool and this is where it gets crazy while some 00:02:47.280 --> 00:02:48.960 Researchers suggest it represents a shepherd's 00:02:48.960 --> 00:02:51.280 staff. A highly prevalent theory is that it was 00:02:51.280 --> 00:02:54.300 originally a drawing of an ox goad. An ox goad. 00:02:54.300 --> 00:02:57.120 Yes. For those unfamiliar, an ox goad is essentially 00:02:57.120 --> 00:03:00.099 a cattle prod. A cattle prod. Yeah. It was a 00:03:00.099 --> 00:03:02.719 long wooden stick with a pointed metal tip, or 00:03:02.719 --> 00:03:05.780 sometimes a hook, used by farmers to poke, steer, 00:03:05.919 --> 00:03:08.180 and motivate livestock. It completely shifts 00:03:08.180 --> 00:03:10.120 the perspective on how we view early writing 00:03:10.120 --> 00:03:12.860 systems. It really grounds it in reality. We 00:03:12.860 --> 00:03:15.060 aren't just looking at letters. We're looking 00:03:15.060 --> 00:03:18.219 at a civilization's literal toolkit. Yep. We 00:03:18.219 --> 00:03:20.860 are using a stylized drawing of a cattle prod 00:03:20.860 --> 00:03:24.699 to construct poetry and write computer code. 00:03:24.840 --> 00:03:27.340 If we connect this to the bigger picture, it 00:03:27.340 --> 00:03:30.060 highlights a profound cognitive leap in human 00:03:30.060 --> 00:03:33.539 history. How so? Well, the highly abstract, minimal 00:03:33.539 --> 00:03:35.919 symbols we use to send digital messages today 00:03:35.919 --> 00:03:40.039 began as literal, recognizable drawings of the 00:03:40.039 --> 00:03:42.819 mundane tools our ancestors required to survive. 00:03:43.080 --> 00:03:46.080 Wow. We took a physical instrument used for prodding 00:03:46.080 --> 00:03:48.500 animals, abstracted its shape over centuries 00:03:48.500 --> 00:03:51.340 of trade and cultural exchange, and transformed 00:03:51.340 --> 00:03:54.319 it into a vehicle for human thought. That is, 00:03:54.319 --> 00:03:57.110 I mean. That's just beautiful. It is. But as 00:03:57.110 --> 00:03:59.250 this shape evolved and eventually became the 00:03:59.250 --> 00:04:01.310 standardized Latin L we use in modern printing, 00:04:01.449 --> 00:04:03.990 it ran into a massive structural problem. Oh, 00:04:04.009 --> 00:04:06.349 a huge problem. Here's where it gets really interesting. 00:04:06.669 --> 00:04:09.689 The lowercase L is an absolute typographical 00:04:09.689 --> 00:04:13.479 nightmare. A designer's worst enemy. Truly. Depending 00:04:13.479 --> 00:04:15.620 on the font you are looking at, it suffers from 00:04:15.620 --> 00:04:18.420 a severe identity crisis. If you are typing in 00:04:18.420 --> 00:04:21.899 a sans -serif font, so fonts like Arial or Helvetica 00:04:21.899 --> 00:04:24.379 that lack the small projecting features at the 00:04:24.379 --> 00:04:27.899 ends of strokes, the lowercase L often looks 00:04:27.899 --> 00:04:31.000 exactly like a capital I. The letter I. Yes, 00:04:31.019 --> 00:04:34.120 the letter I. And if you switch to certain surf 00:04:34.120 --> 00:04:36.959 fonts, the lowercase L can easily be confused 00:04:36.959 --> 00:04:39.699 with the digit one. It is a classic flaw in the 00:04:39.699 --> 00:04:41.879 standardization of typography. Yeah. When you 00:04:41.879 --> 00:04:44.300 reduce a character to a single vertical stroke, 00:04:44.579 --> 00:04:47.680 you strip away the visual information our brains 00:04:47.680 --> 00:04:50.660 require to instantly distinguish it from other 00:04:50.660 --> 00:04:53.079 single vertical stroke characters. You need those 00:04:53.079 --> 00:04:55.860 cues. We rely on those visual cues for rapid 00:04:55.860 --> 00:04:58.660 cognitive processing. Without them, our reading 00:04:58.660 --> 00:05:01.120 speed drops and our error rate increases. Which 00:05:01.120 --> 00:05:04.009 is bad. Bad news for any text. Exactly. To combat 00:05:04.009 --> 00:05:06.310 this, type designers have had to engineer specific 00:05:06.310 --> 00:05:09.550 architectural solutions for letters just to fix 00:05:09.550 --> 00:05:12.069 this visual traffic jam. Font designers have 00:05:12.069 --> 00:05:13.889 historically had to get incredibly creative. 00:05:14.269 --> 00:05:16.430 They really have. The Romain du Roy typeface 00:05:16.430 --> 00:05:18.910 is a perfect historical example. Oh, the King's 00:05:18.910 --> 00:05:21.050 Roman. Right. This was a typeface commissioned 00:05:21.050 --> 00:05:24.269 by King Louis XIV of France in the late 17th 00:05:24.269 --> 00:05:27.050 century. And the design mandate for that was 00:05:27.050 --> 00:05:30.529 strict mathematical precision. Very strict. In 00:05:30.529 --> 00:05:33.490 that design, the ascenders of the lowercase letters, 00:05:33.550 --> 00:05:35.470 the parts of the letters that stick up, have 00:05:35.470 --> 00:05:38.009 symmetrical serifs at the top. Right. But for 00:05:38.009 --> 00:05:40.649 the lowercase L, the designers intentionally 00:05:40.649 --> 00:05:43.350 broke that symmetry. They had to. They added 00:05:43.350 --> 00:05:45.829 an extra serif. extending to the left at the 00:05:45.829 --> 00:05:48.589 mean line, purely as a structural workaround 00:05:48.589 --> 00:05:50.769 to ensure readers wouldn't confuse it with a 00:05:50.769 --> 00:05:54.509 capital I. And we see modern digital equivalents 00:05:54.509 --> 00:05:57.029 of that workaround today. Like where? In computer 00:05:57.029 --> 00:05:59.790 fonts, like Trebuchet MS designers, incorporate 00:05:59.790 --> 00:06:02.730 as a specific feature called a finial. A finial? 00:06:02.889 --> 00:06:06.569 Yes. A finial is a stylized curve or termination 00:06:06.569 --> 00:06:10.189 of a stroke. In Trebuchet MS, the lowercase l 00:06:10.189 --> 00:06:12.370 has a distinct little curve to the right at the 00:06:12.370 --> 00:06:13.949 very bottom. Oh, I know exactly what you're talking 00:06:13.949 --> 00:06:16.250 about. about right it acts as a visual anchor 00:06:16.250 --> 00:06:18.850 signaling to your brain immediately that you 00:06:18.850 --> 00:06:21.610 are looking at an l and not an i that's so smart 00:06:21.610 --> 00:06:24.430 font design is not just about aesthetics it is 00:06:24.430 --> 00:06:27.680 a defensive measure against human error And when 00:06:27.680 --> 00:06:29.920 you cannot tell the difference between characters, 00:06:30.100 --> 00:06:33.939 the real world consequences extend far beyond 00:06:33.939 --> 00:06:37.199 a typo in an email. Definitely. This visual ambiguity 00:06:37.199 --> 00:06:40.360 caused a genuine crisis in the scientific community, 00:06:40.480 --> 00:06:43.439 specifically regarding the metric system and 00:06:43.439 --> 00:06:45.490 the symbol for the leader. It is an excellent 00:06:45.490 --> 00:06:47.949 case study in the intersection of typography 00:06:47.949 --> 00:06:50.629 and global standardization. Tell us about it. 00:06:50.990 --> 00:06:53.449 So in the metric system, the official symbol 00:06:53.449 --> 00:06:56.149 for the leader was traditionally a lowercase 00:06:56.149 --> 00:06:59.069 L. Okay. However, because a printed lowercase 00:06:59.069 --> 00:07:01.769 L looks identical to the number one in so many 00:07:01.769 --> 00:07:04.970 typefaces, scientists, pharmacists, and engineers 00:07:04.970 --> 00:07:07.490 were constantly running the risk of misreading 00:07:07.490 --> 00:07:10.529 vital measurements. Oh, wow. Imagine a medical 00:07:10.529 --> 00:07:12.930 professional reading a dosage and confusing one 00:07:12.930 --> 00:07:15.399 L for the number 11. That is terrifying. The 00:07:15.399 --> 00:07:17.779 potential for catastrophic error was immense. 00:07:18.120 --> 00:07:20.879 To mitigate that risk, many regions adopted a 00:07:20.879 --> 00:07:24.240 cursive handwriting style lowercase L, the looped 00:07:24.240 --> 00:07:26.480 symbol. Right, just script L. And that looped 00:07:26.480 --> 00:07:28.800 cursive character is actually still the standard 00:07:28.800 --> 00:07:31.160 symbol for the leader in countries like Japan 00:07:31.160 --> 00:07:33.519 and Korea today. Which works well for them. But 00:07:33.519 --> 00:07:35.800 the confusion remains such a pervasive global 00:07:35.800 --> 00:07:40.500 issue that in 1979, the 16th General Conference 00:07:40.500 --> 00:07:43.139 on Weights and Measures had to officially intervene. 00:07:43.639 --> 00:07:46.339 They stepped in and formally adopted the capital 00:07:46.339 --> 00:07:49.379 L as an alternative symbol for the leader explicitly 00:07:49.379 --> 00:07:51.920 to avoid the risk of confusing the lowercase 00:07:51.920 --> 00:07:54.819 L with the numeral one. It's amazing that it 00:07:54.819 --> 00:07:56.879 took an international conference to solve a font 00:07:56.879 --> 00:07:59.889 issue. Right. So when you look at a nutritional 00:07:59.889 --> 00:08:02.949 label on a bottle of water today and see a capital 00:08:02.949 --> 00:08:06.290 L used for liters, you are looking at the direct 00:08:06.290 --> 00:08:08.949 result of an international scientific mandate 00:08:08.949 --> 00:08:11.389 designed to prevent typographical disasters. 00:08:11.930 --> 00:08:14.550 So we have traced its visual evolution and its 00:08:14.550 --> 00:08:16.990 typographical struggles, but that is only half 00:08:16.990 --> 00:08:19.029 the story. We have to talk about the sound. We 00:08:19.029 --> 00:08:20.709 also need to examine how this letter actually 00:08:20.709 --> 00:08:23.930 sounds. It is the 11th most frequently used letter 00:08:23.930 --> 00:08:26.149 in the English language, meaning we are engaging 00:08:26.149 --> 00:08:29.339 with it constantly. But in English orthography, 00:08:29.560 --> 00:08:32.419 the letter does not just map to one simple phonetic 00:08:32.419 --> 00:08:35.539 output. No, it's quite sneaky. If we look closely 00:08:35.539 --> 00:08:39.320 at received pronunciation, the standard accent 00:08:39.320 --> 00:08:42.720 of standard English in the United Kingdom, there 00:08:42.720 --> 00:08:46.519 are actually two entirely distinct L sounds hiding 00:08:46.519 --> 00:08:48.980 in our daily speech. Two different sounds for 00:08:48.980 --> 00:08:51.759 one letter? And which one you use depends entirely 00:08:51.759 --> 00:08:53.840 on where the letter is positioned within a word. 00:08:54.169 --> 00:08:56.429 This is where we dive into the physical mechanics 00:08:56.429 --> 00:08:59.450 of phonetics. Yes. The letter L generally represents 00:08:59.450 --> 00:09:02.409 a lateral consonant, meaning the sound is produced 00:09:02.409 --> 00:09:05.269 by directing airflow over the sides of the tongue 00:09:05.269 --> 00:09:07.809 rather than down the middle. Let's break down 00:09:07.809 --> 00:09:10.350 the first one, the alveolar lateral approximate. 00:09:10.730 --> 00:09:12.809 A very technical name for a very common sound. 00:09:13.070 --> 00:09:15.389 Exactly. This is the sound you produce when the 00:09:15.389 --> 00:09:17.889 L comes before a vowel. If you are listening, 00:09:17.990 --> 00:09:20.909 try saying the words lip or blend out loud. Lip, 00:09:20.909 --> 00:09:24.059 blend. Notice what your tongue is doing. The 00:09:24.059 --> 00:09:25.860 tip of your tongue is reaching up and tapping 00:09:25.860 --> 00:09:28.460 the alveolar ridge, which is that hard, bumpy 00:09:28.460 --> 00:09:30.779 area right behind your upper front teeth. Right. 00:09:30.899 --> 00:09:34.259 That crisp, frunkle sound is the alveolar lateral 00:09:34.259 --> 00:09:36.879 approximant. But if the L comes at the end of 00:09:36.879 --> 00:09:39.679 a syllable or after a vowel, as in the words 00:09:39.679 --> 00:09:43.039 bell or milk, you engage a completely different 00:09:43.039 --> 00:09:46.639 physical mechanism. The dark L. Yes. This is 00:09:46.639 --> 00:09:49.940 called the velarized alveolar lateral approximant, 00:09:49.940 --> 00:09:52.909 often referred to as the dark L. So what's happening 00:09:52.909 --> 00:09:55.470 in the mouth there? When you say milk, the tip 00:09:55.470 --> 00:09:57.629 of your tongue might still touch the alveolar 00:09:57.629 --> 00:10:00.549 ridge, but you are also simultaneously raising 00:10:00.549 --> 00:10:03.110 the back of your tongue toward the vellum or 00:10:03.110 --> 00:10:05.690 the soft palate at the back of your throat. You 00:10:05.690 --> 00:10:08.750 can physically feel the resonance shift lower 00:10:08.750 --> 00:10:11.490 and further back in your mouth. It is essentially 00:10:11.490 --> 00:10:14.549 a highly specialized gymnastic routine for your 00:10:14.549 --> 00:10:17.570 tongue that native speakers perform automatically 00:10:17.570 --> 00:10:19.850 without a second thought. What's fascinating 00:10:19.850 --> 00:10:22.570 here is that this specific phonetic quirk, the 00:10:22.570 --> 00:10:25.250 velarization of the L at the end of words, does 00:10:25.250 --> 00:10:28.190 not occur in many other European languages. Really? 00:10:28.389 --> 00:10:31.549 Yeah. Most European languages use the clear frontal 00:10:31.549 --> 00:10:34.309 alveolar L regardless of where the letter sits 00:10:34.309 --> 00:10:36.690 in a word. So they don't have the dark L at all? 00:10:36.889 --> 00:10:41.049 No. Furthermore... This dual pronunciation rule 00:10:41.049 --> 00:10:44.809 is the exact reason why the English L is notoriously 00:10:44.809 --> 00:10:47.129 difficult for non -native speakers to master. 00:10:47.309 --> 00:10:49.950 That makes total sense. Particularly for users 00:10:49.950 --> 00:10:52.769 of languages that either lack the lateral approximate 00:10:52.769 --> 00:10:55.529 entirely or have different phonetic values for 00:10:55.529 --> 00:10:57.889 it. Like which languages? Japanese, for instance, 00:10:58.149 --> 00:11:01.129 has a single liquid consonant that falls somewhere 00:11:01.129 --> 00:11:04.409 between an English R and an L. Oh, right. And 00:11:04.409 --> 00:11:07.470 some southern dialects of Chinese also have different 00:11:07.470 --> 00:11:10.009 phonetic rules regarding it. So they're coming 00:11:10.009 --> 00:11:12.190 at it from a completely different baseline. Exactly. 00:11:12.389 --> 00:11:14.970 When your native language does not require you 00:11:14.970 --> 00:11:17.429 to valorize a lateral approximate in your throat, 00:11:17.649 --> 00:11:19.889 training your mouth to perfectly pronounce a 00:11:19.889 --> 00:11:23.190 word like milk in English is a significant physiological 00:11:23.190 --> 00:11:26.389 and linguistic hurdle. And sometimes the physiological 00:11:26.389 --> 00:11:29.269 ability to produce the letter is restricted altogether. 00:11:29.690 --> 00:11:32.169 Yes, that's true. There is a specific speech 00:11:32.169 --> 00:11:34.870 impediment or medical condition known as lambdicism, 00:11:35.090 --> 00:11:37.909 which restricts a person's ability to articulate. 00:11:37.960 --> 00:11:39.980 articulate the L sound correctly. But what is 00:11:39.980 --> 00:11:42.679 truly strange about English is that even when 00:11:42.679 --> 00:11:44.980 we have the physical capability to pronounce 00:11:44.980 --> 00:11:47.940 it, we often have this habit of just ignoring 00:11:47.940 --> 00:11:51.679 the letter entirely. Ah, the silent L. I am talking 00:11:51.679 --> 00:11:53.740 about the silent L. We see it in words like walk, 00:11:53.840 --> 00:11:57.700 could, palm, and psalm. The silent L is a fascinating 00:11:57.700 --> 00:11:59.960 artifact of language evolution. Why do we even 00:11:59.960 --> 00:12:02.740 still write it? Well, in many cases, those letters 00:12:02.740 --> 00:12:05.139 were pronounced centuries ago. But as spoken 00:12:05.139 --> 00:12:07.580 English evolved and certain consonant clusters 00:12:07.580 --> 00:12:10.740 became smoothed out for ease of speech, the L 00:12:10.740 --> 00:12:13.259 sound vanished from the spoken word while the 00:12:13.259 --> 00:12:15.360 written spelling remained frozen in time. But 00:12:15.360 --> 00:12:18.440 it isn't completely powerless, is it? Even when 00:12:18.440 --> 00:12:20.700 we don't vocalize it, it still influences the 00:12:20.700 --> 00:12:23.220 word. Precisely. Even when the L is silent in 00:12:23.220 --> 00:12:25.399 English, it often acts as a sort of ghost letter. 00:12:25.500 --> 00:12:27.740 A ghost letter. I love that. Its physical pronunciation 00:12:27.740 --> 00:12:30.799 has disappeared, but its presence on the page 00:12:30.799 --> 00:12:33.440 still modifies the value of the vowel letter 00:12:33.440 --> 00:12:35.539 that precedes it. Okay, give us an example. If 00:12:35.539 --> 00:12:37.379 you compare the word walk with the word wake, 00:12:37.539 --> 00:12:40.179 the A sounds entirely different. Walk. Wake. 00:12:40.360 --> 00:12:43.279 Yeah, completely different. The silent L in walk 00:12:43.279 --> 00:12:45.580 anchors the history of the word's pronunciation. 00:12:46.590 --> 00:12:49.330 dictating how the letters around it behave. It 00:12:49.330 --> 00:12:51.690 is a silent conductor orchestrating the vowel 00:12:51.690 --> 00:12:54.409 sound. That concept of a ghost letter shaping 00:12:54.409 --> 00:12:56.990 the acoustics around it is brilliant. It really 00:12:56.990 --> 00:12:59.230 highlights how weird English spelling is. It 00:12:59.230 --> 00:13:02.049 does. And while it is silently altering English 00:13:02.049 --> 00:13:04.929 vowels, the letter L is shapeshifting completely 00:13:04.929 --> 00:13:07.149 in other parts of the world. Let's look globally. 00:13:07.429 --> 00:13:09.470 Let's explore how this letter behaves internationally 00:13:09.470 --> 00:13:12.669 because the variations are striking. In Welsh, 00:13:12.710 --> 00:13:16.639 for example, the digraph Two lowercase L's placed 00:13:16.639 --> 00:13:21.059 together creates a voiceless alveolar lateral 00:13:21.059 --> 00:13:24.159 fricative. To demystify that term, a fricative 00:13:24.159 --> 00:13:26.399 means you are creating friction with your breath. 00:13:26.620 --> 00:13:28.639 Okay. So you place your tongue in the position 00:13:28.639 --> 00:13:31.220 for a normal L, but instead of using your vocal 00:13:31.220 --> 00:13:34.259 cords to make a voice sound, you force air aggressively 00:13:34.259 --> 00:13:35.860 around the sides of your tongue. So it's like 00:13:35.860 --> 00:13:38.720 a kick. It creates a sharp, breathy. Hiss. It 00:13:38.720 --> 00:13:41.240 sounds incredibly distinct. Then you look at 00:13:41.240 --> 00:13:43.720 Spanish, where double L represents a palatal 00:13:43.720 --> 00:13:46.700 lateral approximate. The palatal aspect means 00:13:46.700 --> 00:13:49.059 the middle of the tongue raises toward the hard 00:13:49.059 --> 00:13:51.659 palate, the roof of the mouth. But its exact 00:13:51.659 --> 00:13:54.279 pronunciation changes wildly depending on the 00:13:54.279 --> 00:13:56.799 dialect. Oh, it really does. In different parts 00:13:56.799 --> 00:13:58.840 of the Spanish -speaking world, it can sound 00:13:58.840 --> 00:14:02.279 like an English Y, a soft J, or even a shift 00:14:02.279 --> 00:14:04.940 sound. And we shouldn't overlook the Washoe language. 00:14:05.200 --> 00:14:08.159 Oh, right. It's an endangered indigenous language 00:14:08.159 --> 00:14:11.620 of North America, which utilizes the letter L 00:14:11.620 --> 00:14:14.179 in a way that fundamentally alters our traditional 00:14:14.179 --> 00:14:16.840 understanding of capitalization. This blew my 00:14:16.840 --> 00:14:18.860 mind when I read the source material. In their 00:14:18.860 --> 00:14:21.779 orthography, a lowercase L represents a typical 00:14:21.779 --> 00:14:25.220 voiced L sound. But an uppercase L is not used 00:14:25.220 --> 00:14:27.919 merely for proper nouns or the beginning of sentences. 00:14:28.320 --> 00:14:30.860 It changes the sound. Exactly. It represents 00:14:30.860 --> 00:14:33.740 a voiceless sound, acoustically similar to that 00:14:33.740 --> 00:14:36.460 double L in Welsh. The capitalization itself 00:14:36.460 --> 00:14:38.659 changes the phonetic value of the character. 00:14:39.000 --> 00:14:41.840 It turns the standard rules of upper and lowercase 00:14:41.840 --> 00:14:44.620 completely upside down. Entirely. But this shape 00:14:44.620 --> 00:14:46.639 -shifting nature doesn't stop at spoken language. 00:14:47.340 --> 00:14:50.279 The letter L acts as a structural pillar in so 00:14:50.279 --> 00:14:52.799 many other disciplines. It's everywhere. In chemistry, 00:14:52.919 --> 00:14:56.080 a capital L is universally recognized as the 00:14:56.080 --> 00:14:59.100 symbol for the Avogadro constant, a fundamental 00:14:59.100 --> 00:15:01.899 physical constant representing the number of 00:15:01.899 --> 00:15:04.919 constituent particles in a mole of a given substance. 00:15:05.240 --> 00:15:07.379 It also appears in historical manufacturing. 00:15:07.779 --> 00:15:10.820 Yeah. In traditional French watchmaking, an uppercase 00:15:10.820 --> 00:15:14.419 L is the abbreviation for a line. A line. A line 00:15:14.419 --> 00:15:17.100 is a traditional measure of length. predating 00:15:17.100 --> 00:15:19.500 the metric system that is still utilized today 00:15:19.500 --> 00:15:22.419 by horologists to designate the casing diameter 00:15:22.419 --> 00:15:25.220 of a watch movement. That's incredibly specific. 00:15:25.399 --> 00:15:27.460 It's a highly specialized unit of measurement 00:15:27.460 --> 00:15:30.299 kept alive by a specific industry anchored by 00:15:30.299 --> 00:15:33.019 the letter L. We also see it as the Roman numeral 00:15:33.019 --> 00:15:35.919 for the number 50. And it is deeply embedded 00:15:35.919 --> 00:15:39.139 in global finance. Currency symbols. Yes, it 00:15:39.139 --> 00:15:41.039 serves as the currency sign for the Albanian 00:15:41.039 --> 00:15:43.700 lake, the Honduran Lampira. And historically, 00:15:43.740 --> 00:15:46.000 it was the currency sign for the Italian lira. 00:15:46.159 --> 00:15:48.220 The financial applications actually lead to one 00:15:48.220 --> 00:15:49.879 of the most surprising historical connections 00:15:49.879 --> 00:15:52.419 we have discussed. The pound sterling. We mentioned 00:15:52.419 --> 00:15:54.399 the British pound sterling at the very beginning 00:15:54.399 --> 00:15:56.820 of this deep dive. The symbol for the pound, 00:15:56.899 --> 00:15:59.240 the curly E -looking symbol with the line through 00:15:59.240 --> 00:16:02.759 it, is directly derived from the letter L. Right, 00:16:02.840 --> 00:16:04.759 because it traces back to the Latin word labra, 00:16:04.799 --> 00:16:06.759 which translates to a pound of weight. Correct. 00:16:06.980 --> 00:16:09.460 And the symbol we use today is essentially a 00:16:09.460 --> 00:16:12.679 stylized... Black letter L. Exactly. The black 00:16:12.679 --> 00:16:15.340 letter script, often referred to as Gothic script, 00:16:15.559 --> 00:16:18.700 was a highly ornate, heavily stylized typeface 00:16:18.700 --> 00:16:21.279 used throughout Western Europe from the 12th 00:16:21.279 --> 00:16:24.740 to the 17th century. Okay. When L was used as 00:16:24.740 --> 00:16:27.279 an abbreviation for Libra within the historical 00:16:27.279 --> 00:16:29.519 pounds, shillings, and pence system, commonly 00:16:29.519 --> 00:16:33.220 known as the LSD system, that ornate L became 00:16:33.220 --> 00:16:35.580 the standard. Usually with a line through it. 00:16:35.740 --> 00:16:37.960 Yes, usually with a single or double horizontal 00:16:37.960 --> 00:16:40.879 line drawn through it to indicate it was an abbreviation. 00:16:41.059 --> 00:16:42.960 So every time someone looks at a price tag in 00:16:42.960 --> 00:16:45.679 London or checks an exchange rate, they are looking 00:16:45.679 --> 00:16:49.110 at a medieval Gothic variation. of the 12th letter 00:16:49.110 --> 00:16:51.950 of the alphabet. It is a testament to how deeply 00:16:51.950 --> 00:16:54.250 entrenched these symbols are in our societal 00:16:54.250 --> 00:16:57.250 infrastructure. So what does this all mean? We 00:16:57.250 --> 00:16:58.909 started by just looking down at the keyboards 00:16:58.909 --> 00:17:01.710 in front of us, and we have ended up spanning 00:17:01.710 --> 00:17:04.150 the globe and centuries of human history. It's 00:17:04.150 --> 00:17:06.190 quite the journey. The 12th letter of the alphabet 00:17:06.190 --> 00:17:09.470 is a true shapeshifter. It began as an ancient 00:17:09.470 --> 00:17:12.990 agricultural tool, a pictogram carved in stone 00:17:12.990 --> 00:17:16.609 used to manage livestock. The ox goad. It evolved 00:17:16.609 --> 00:17:19.289 into a phonetic hurdle that requires specialized 00:17:19.289 --> 00:17:22.970 subconscious ton placements. It became a typographical 00:17:22.970 --> 00:17:25.789 puzzle that forced the scientific community to 00:17:25.789 --> 00:17:28.650 alter the metric system and forced designers 00:17:28.650 --> 00:17:31.569 to invent new architectural features for typefaces. 00:17:31.809 --> 00:17:34.289 And it morphed into a unit of chemical measurement, 00:17:34.589 --> 00:17:37.089 a standard for watchmakers, and the foundation 00:17:37.089 --> 00:17:40.269 of global currencies. This raises an important 00:17:40.269 --> 00:17:42.369 question regarding how much invisible design 00:17:42.369 --> 00:17:44.690 and history we carry around in our pockets and 00:17:44.690 --> 00:17:46.900 on our screens. every single day. It really does. 00:17:47.119 --> 00:17:49.359 We tend to take the fundamental building blocks 00:17:49.359 --> 00:17:51.160 of our communication completely for granted. 00:17:51.339 --> 00:17:54.299 We press a plastic key or tap a piece of glass 00:17:54.299 --> 00:17:57.599 and a symbol appears. We rarely stop to consider 00:17:57.599 --> 00:18:00.640 the thousands of years of human ingenuity, cultural 00:18:00.640 --> 00:18:04.519 exchange, trial and error that went into standardizing 00:18:04.519 --> 00:18:07.500 that single stroke of digital ink. It's staggering 00:18:07.500 --> 00:18:09.299 when you really think about it. The alphabet 00:18:09.299 --> 00:18:11.700 is essentially a living museum of human thought, 00:18:11.880 --> 00:18:14.680 and every single character possesses a com - 00:18:14.730 --> 00:18:17.450 complex, evolving biography. A living museum. 00:18:18.170 --> 00:18:20.289 And I want to leave you with a final thought 00:18:20.289 --> 00:18:22.509 to mull over. Oh, this is a good one. The next 00:18:22.509 --> 00:18:25.210 time you are frantically trying to log into a 00:18:25.210 --> 00:18:27.670 digital account and you get locked out because 00:18:27.670 --> 00:18:30.309 you cannot figure out if a complicated password 00:18:30.309 --> 00:18:34.589 requires a lowercase L, a capital I, or the number 00:18:34.589 --> 00:18:37.309 one. Take a deep breath. Best pause. Amidst your 00:18:37.309 --> 00:18:40.430 frustration, consider the sheer historical irony 00:18:40.430 --> 00:18:43.170 of the situation. That little vertical line on 00:18:43.170 --> 00:18:45.789 your screen is the direct descendant of an ancient 00:18:45.789 --> 00:18:48.410 Phoenician symbol for an ox goad. A cattle prod. 00:18:48.690 --> 00:18:51.250 And thousands of years later, it is still subtly 00:18:51.250 --> 00:18:53.529 prodding, frustrating, and poking the boundaries 00:18:53.529 --> 00:18:56.529 of our modern digital lives. Poetic. Keep exploring, 00:18:56.690 --> 00:18:58.309 and we will see you on the next deep dive.