Now that you know why X is generally the unknown in mathematics check out this video and find out the answer to the question- When Did People Start Using Punctuation?: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0JR2O-cMG4o.html
Great insight but why not push a little further. At least oriental commentators of history have pointed out that Descarte's work reflects a lot if not all of what Al-Ghazali has produced on logique. Descarte's "Discourse on the Method" is strikinly similar to Al-Ghazali's work. Algebra was introduced to the west by the arabs. It seems way more likely that Descartes was inspired by the arabs mathematical work translated by spagniards as he seems to have been inspired from their phylosophical work.
Like the great 'philosopher' of our time DMX said. "X is going to give it to you" ... That said I am unsure if he delivers outside of business hours. check the terms and conditions i guess.
Sir, I wish to inform you that you have been selected in an unclear process a black clothed man in the style of a rapper who has received the given name of ‘X’ and as a result of being selected in this process the man known as ‘X’ has a plan which he will soon execute in which he will decide to distribute something that is of an unknown quantity or nature but is likely to be dangerous to yourself.
Is the man not referring to himself.. as in "I'm gonna give it to ya", as in, a physical altercation? I could be wrong, I haven't studied the literature.
I don't like ads, but I super liked that ad because we got to hear your more hipster regular dude voice in contrast to your professional polite alter ego ^_^
I'm sure others have written this but you have a big "oopsie" in this video. DesCartes said "cogito ergo sum". Your version, "cognito ergo sum" means "I hide therefore I am". Other than that, I even enjoyed the ad.
wayland griffith why does google translate write both cognito ergo sum and cogito ergo sum as the same? Cognito alone is "aware", cogito alone is "Think/reflect"?
To get your item to focus; put your other hand behind it when you bring it close. It basically makes the background a solid colour and allows your camera to focus on the one item. Hope this helps!
Or you could write 'x' as two opposite sided parabolas that connect to each other. If you don't understand what I mean, Take a moment and think about it.
W didn't exist. And it is the phonetic value, not the shape that is relevant here. ش is the written letter for "sh" in Arabic and in Mediaeval Spanish x was the written letter used for the "sh" sound.
I have noticed one glaring flaw in what you said: X being used by the Spanish to represent the sh would be because X was used in Spanish (Old Spanish to be more precise, Spanish has changed a bit since then) to represent that very sound. Unlike what you say here, this X wasn't from Greek Chi and didn't have a "ck" sound, but rather came from the Latin X which had a ks sound in Latin but was used for a sh sound by the time of Old Spanish. Of course later both the sh sound of X and the zh sound of J in spanish merged and became later a kh sound (very similar to a h sound), which happens to be the same sound that the Greek letter Chi has in modern Greek pronunciation. But not only is that just a coincidence but other than in few proper names and Latin American spellings that didn't change, X that was sh has been replaced by J and X is only used today for the classical ks sound. Basically there is a very simple reason why X would be used for the Arabic sh sound: X was the Spanish way to write that sound in Spanish. Nothing to complicated here.
One day I was reading the RU-vid comments and someone said "Simon Whistler is daddy"; now I can't get it out of my head. Every time I see him I think, Simon Whistler is daddy, so that's a thing now.
Next on "Today I Found Out": Why in the Queens English its pronounced 'zed' and in American English, 'zee' Along with other spelling and pronunciation differences across the pond.
Perfect. The Wix ad came right in the middle of the Dollar shave club ad. And then when I skipped the Wix ad, the player went into forever loading fail. WAY TO GO, RU-vid!
Simon, as an engineer, I found your final bonus fact about the education comparisons between countries much more intriguing than the rest of the video. Glad I watched to the end! Don't get me wrong, I enjoyed this one in its entirety and all of your videos, but this bonus fact just illustrates a possible need for an entire video dedicated to just this one subject. It shows how important it is to assess the state of our education system in the USA. Thanks for the great channel!
Zoofus well, if we’re going to be pedantic the phrase “dubito, ergo cogito, ergo sum” is more close to what Descartes was trying to convey. I doubt, therefore I think, therefore I am.
Jackson Almodobar But that isn't the quote. That is a latin translation of a french quote by poet Antoine Léonard Thomas more than 100 years after Descartes first used that phrase. So no, that would not be pedantic.
Zoofus I meant being pedantic about the thought process behind the well known quote, not the authenticity of the quote itself. It’s not specifically thinking that validates one’s existence, it’s doubting, which implies thinking, witch implies our own existence.
Note for 01:18 . The word for unknown thing is “shai’a” which is also can be translated to “thing”. “Alshai’a” = “the thing”. So. ( 3 Shai’a = 15 means Shai’a = 15/3 which is equal to 5 ). To hear the pronunciation of Shai’a copy this ( شيء )
Should also be noted that in physics letters stand for other things. For example m is mass, a is acceleration, g is gravity, f is force, w is watt, j is jules, and s forth. X y z have no corresponding notation in formulas
Normally there is a electromagnet in there that pulls a metal rod against a ringing plate. Once the magnet turns of the rod returns to it's original position but because it still has some energy stored it overshoots and hits a ringing plate on the other side. Ding dong.
Considering it is a geometry book it seems to make sense that X would be used as the horizontal axis number line as the base, with Y as the vertical, and Z being the depth. Thus, X axis would be the first order teaching tool for points, magnitudes, lines, rays, numbers, etc.
this is related to the poverty fact that you mentioned but high PISA scores of many countries is attributed to cram schools. so basically, many countries especially in asia basically have another school day after their regular school day that only focuses on math. also, just the the fact that something is ranked inherently forces people to think in a hierarchy when in fact the range of scores between countries isn't so vast.
I went to a school once that was a state (and national) powerhouse in academics as an elementary. The powers that be decided that this district needed to use forced busing. So while the dominant local community was upper-middle class (i.e. whiter than a sheet), there was an entire grade that was essentially all low-income black. I scored really high on a standardized, competitive test in math. I nearly aced it. So I, along with 3 other high-scoring students, received awards and accolades for putting our school into the top of the state-wide competition. It sort of surprised my teacher and my classmates, as I was a recent transfer from a backwards, rural district, and my abilities were unknown at the time. But back to the school busing for desegregation purposes. When I went outside for recess, I will never forget how we who were local would interact with the kids who were bused in. There was a particular girl that I can never forget. Her name was Poughkeepsie, and she was meaner, stronger, and faster than virtually all of the (white) guys in the grade ahead of her. I think I was an exception to that as I was a bit bigger, but she was able to out-compete me in the long jump I remember distinctly. Her sprint speed was almost unassailable by all but the fastest black boys, and then only in the longer races. She would catch quite a few unsuspecting boys trying to beat a path to the swingset and trip them from behind. She was regularly fighting both girls and boys on the playground. I wonder where she is now and whether she learned anything in math class in the best school in the district during her 1-year stint in whiteyville? She and her compatriots that were bused in to our local school ate free/reduced meals at the cafeteria. I packed a lunch and staggered to think of eating that junk. Maybe cafeteria food makes you mean and strong? Of all the bullies I knew in school, she was probably the most prolific. Since I don't remember any other names of any other classmates in that school, I guess she made an impression. I hope you enjoyed my vignette of public schooling back in the day.
At 8:23 -- oops! Descartes' observation was "Cogito ergo sum." Cognito is close in meaning, from cogitere: to learn, become aware but is not what Descartes posited. How unlike you to err.
Very fascinating video, and the ad you did was entertaining, but the line that Descartes actually said (at 8:24) was "Cogito ergo sum," not "Cognito ergo sum." It's an easy thing to mix up because "incognito" (meaning "unknown") is a word that's been adopted from Italian into common English usage, but "cognito" means "known," not "to know/think," and so while I'm not 100% sure where that "n" comes from, as it is no doubt related to "cogito," it's likely part of a past participle inflection with which I'm not familiar (since I don't know Italian). Therefor, "cognito ergo sum" is ungrammatical, but the closest approximation of a translation would be "I am known therefor I am" -- and that sounds like someone with a serious obsession with celebrity. Perhaps Julius Caesar once said it? Doubtful, but fun to think about. Anyway, I really hope you enjoyed this comment. Please leave a thumbs up if you do, and as always, thanks for reading.
So funny, all I could think to myself when you were quoting the PISA mathematical results was, "I wonder how many people can understand this". Great channel, love it.
1:15 The Arabic word for "unknown" is *Shay'on* wich literally means : a thing. If we add the prefix "Al"(-The- in English) to it, it won't be unknown anymore, like if we say: The thing, it is not unknown. I'm Arabian btw.
Inserting the promo between the main piece and the bonus facts works well. Those who found the main part uninteresting would not hang around for the bonus facts, but they'd be less attentive to endorsements too.
I am sorry, but even thought Descartes had a big role in popularizing thoses notations, the one who came up with using the alphabet for parameters (known and unknown) was François Viète. And if i am not mistaken the first to introduce the exponnant notation for the powers was Simon Stevin.
Simon, have you been on TED talks yet? I feel like you'd be a phenomenal speaker if you already haven't, I'll have to check, keep up the good work, friend!
Now for another bonus fact: Descartes famous saying isn't "Cognito Ergo Sum". The correct saying is "Cogito Ergo Sum". I hope you found this correction helpful.
I call shenanigans on the "printer suggested" theory. If they had far less need for 'x' blocks, they would simply have fewer blocks. Printing was a business, and it wouldn't make financial sense to keep more of a letter block around than they would expect to need. So unless his printer had recently been paid to print something that made heavy use of the letter 'x', thus requiring him to commission extra blocks for it, there's no reason he'd have significantly more of them than he did for 'y' (fairly common by comparison) or 'z' (slightly less common, but by a small margin).
Before this video I got the Zoopla ad where the boy snail says to the girl snail _"Remember when we lived there?"_ and the girl snail replies _"That was your ex."_
The letter Z originates from the Greek, where it was called "zeta". When it was imported into English, "zeta" evolved into "zed". Later, after the American Revolution, the name of the letter Z was changed to match letters such as B, C, D, whose names consist of the letter sound followed by a long E sound.
*Clears throat in Canadian* In my opinion, zed is the better way to go because it is harder to confuse with C. But, I don't know if that argument holds any water because we still have B and D, M and N, Also B and P. The military uses a standard phonetic alphabet to avoid exactly this type of confusion.
Funny with the Shave Club razor promo, and it does seem to be a very good razor. As for the US having spent $115,000 per student while the Slovak Republic spent $53,000, this`d need further explanation; because, f.e., how much Slovak money was worth to citizens in the country, vs the same in the US. Iow, the relative values, rather than only the nominal, is relevant.
Something is confusing me in this video. I grew up speaking Arabic and I have never heard of the word Al-shalan (الشلان). The common word for unknown is Majhool (مجهول). Has any other Arabic speaker heard of the word referred to in this video, and can you confirm its meaning?
Also, "x" used to be the signature for illiterate people... In other words, it was a placeholder. "It is also used as a replacement for a signature for a person who is blind or illiterate and thus cannot write his or her name." en.wikipedia.org/wiki/X_mark
Thank God you said ZED and not ZEE Mr Whistler and no mistake. Watched your long video about the making of your channel and it was excellent. This is another top vid. Keep it up.
Wayne Goddard big relief! He makes me shudder when he uses colonial words such as expiration and obligated. If he's going to do that he should put on an accent.
In regards to the testing as well, we here in the USA test everyone no matter what their IQs are. These test scores are then put in with the other countries scores, some of which do not believe in educational programs for students with developmental disabilities
Mike Anderson If that's a joke you missed the mark..I'm sure it's not the first mark you've missed 🤣🤣 and I'm probably not the first woman to tell you that 🤣🤣
Because 6 years ago when it started razors did cost 1 dollar. And btw had best promo video ever ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ZUG9qYTJMsI.html
10:00. Pertaining to how much money is spent per student in the USA, there might be two reasons why so much is spent and so little education is accomplished. First, the cost might be because the cost of living is higher in the USA. Second, in the USA, a lot if Americans seem to think, "It's only good if it costs a lot of money and isn't complicated." (That's also one of the reasons that many Americans spend so much on vacations, cars, houses, weddings, etc.) Third, instead of public funding of public schools, more and more public money is being handed over to for-profit publicly-traded corporations (PTCs). The goal of for-profit and PTCs is to get as much money as possible while giving customers as little product and service as possible. Fourth, instead of free Medicare For All and free mental health care clinics, public schools are expected to provide those things: school nurses, school psychologists, school therapists, etc. Fifth, our Republican and neoliberal Democrat politicians are deliberately passing laws and defunding public schools to make education cost as much as possible while giving children poor education so that politicians can justify their handing over public schools to for-profit PTCs. Take for example Florida politicians who voted to require public schools to have gun-carrying officers to stop mass shooters from killing students. At the same time, the politicians didn't give the schools or law enforcement agencies money to pay for those officers. So, the schools will have to take money away from education to pay for officers. The politicians could have spent one-time money to create secure entrances, like banks have, to identify, stop, and contain shooters before they enter the schools! I'm sure
I have heard it said that 'working in imperial is like putting a handicap on yourself' (or something to that effect). I wonder what the US result would be like if you did not work with imperial calculations.
Can you please explain how the rear view mirrors in cars work to dim the bright lights when moved to a different angle but still giving you the same view 🤔
Comparisons (among nations) of spending on education and results on standardized tests are a bit misleading. Most countries administer the tests only to those students who intend to attend university, whereas the U.S. administers the tests to ALL students.
Of all the letters, mathematicians had to pick one which was already a Roman numeral. Just recently, I mentioned that X represented ten, and some guy was dumbfounded and insisted that, no, X is always of unknown value. And, of course it also had to be one which was also used as a multiplication sign for maximum confusion.
I think you make an ideal person to do a shaving commercial. You have a head that may need some sections shaved, and a beard that would require trimming, shaping, and outlying areas shaved to give it nice definition.
My own analysis of PISA concluded pretty much the same thing as the report, however they still haven't accounted for cultural capital (ie. US, Canada, and other western countries have a much higher proportion of students born overseas, non-native speakers, and 1st generation native. Whilst Asian schools are much more homogeneous). Also the propensity for western countries not to 'keep kids down', whilst Asian countries tend to have tests in order to enter middle school, which means that the most under educated in Asia will not be taking the test. There are also factors like attitude towards education and test taking readiness, which also favour Asia. On the whole PISA is an apples and oranges comparison, sure, they are both round fruit but in every other way they are different.
Interestingly x is used way more often in introductory maths classes than university. Actual mathematicians and physicists commonly use letters that are related to a word from the context the equation is used in, e.g. p for probability or v for vector. It is mostly in exercises that have no use other than to exercise that you find the letter x. In other words x is typically not just unknown but also meaningless.
Have a Feeling X was Derived from the Infinity Sign. Purpose wise Infinity Includes All. To Represent that they took X and put Parentheses around it to Show it Currently in Superposition until the Equation is Solved.
I'm not putting butter on my face. I know it isn't actually butter. I don't care though. I wouldn't put eye drops in my eyes with the catchy name "Battery Acid". No acid in my eyes. No butter on my face. I HAVE SPOKEN!
A bit of nitpicking, but the quote by Descartes is 'Cogito Ergo Sum' not 'CogNito'? Or is my memory playing tricks with me? Anyways, great bit, keep it up! :)
Awesome video. Slight clarification. According to Google translate, Xenos means Foreign. Xenos Christian Fellowship Church translate the Greek as stranger/sojourn i.e. Someone who is passing through. As the Bible states that we are but visitors in the world, and to help those going by. www.xenos.org/about-xenos/faq/name en.m.wikipedia.org/wiki/Xenos_(Greek)
I've noticed that there's a lot more use of the term "lack of evidence" showing up in these videos in the context of historical events. Having a lack of evidence can be a major concern when you're dealing with experimental evidence for something that can be done in a laboratory experiment, such as measuring the speed of light. However, "lack of evidence" is a bit overrated if you're not talking about something that can be done in a lab. It's not as if you're ever going to get a lot of evidence for a lot of historical events to begin with. Many events simply are not documented very well and we might never find the documentation we'd like to have. So we just use our best judgement with what we have so far. It's okay to say we can't be 100% sure, but we think it's a certain way based on what we have.
Students in Asian countries do literally get at least 2 years ahead in math compared to the US and Canada. Things are generally taught 2 years earlier, and students learn more advanced math in the last 2 years of high school in Asia.
