it's a book by l. kendy, the philosophy of the arabs. now, kennedy was a great poly math. he was a philosopher. he was a mathematician. he was a musician. and i think the part here he talks about, he's got to disc with the arabic alphabet, and he talks about counting the number a particular symbol appears. l. kendy figures out the idea of frequency analysis that when a letter appears a certain number of times, if it's more common than other letters, you can work out what it is. i'll can. this text is the earliest known description of frequency analysis. but that text was only discovered in 1987. before that we had no idea that this supposedly modern technique for studying crypted messages was in use over a 1000 years ago. now, one of the oldest and most simplest ways to encrypt a message to make it secret is simply by substituting each letter. why a different one. let me show you. imagine we have a simple sentence. l kinda was a famous scholar. now provided we have the key, the encryption key, which is also called the cipher, which by the way, comes from the arabic word fo

and later came it's like l. kendy and ross. he's also basing their work on careful experiments and observations. and the way we do chemistry today, organizing and ordering the elements and looking for train in their properties. well, just like the reactivity series, that's what job we're 1st started to do. next time we traveled to some of the most cutting edge medical facilities in the middle east today. that original human genome was sick once in 10 years. now we can sequence the human genome within $6.00 to $10.00 days. how we look back to how one scholar from the golden age challenged accepted ideas to explain the human heart. this is upon that he said relation. that is the discovery. it's now obvious, but it was in them with man see how texts from the atlantic world was so influential in medical science across the globe. the century. science tends to be a good subject to bring different people from all over the world together. ah. in the next episode of science in a golden age, i'm exploring the contributions made by schola

l. kendy figures out the idea of frequency analysis that when a letter appears a certain number of times, if it's more common than other letters, you can work out what it is. i can this text is the earliest known description of frequency analysis. but that text was only discovered in 1987. before that we had no idea that the supposedly modern technique for study encrypted messages was in use over a 1000 years ago. now, one of the oldest and most simplest ways to encrypt a message to make secret is simply by substituting each letter by a different one. let me show you. imagine we have a simple sentence. al, kinda was a famous scholar. now provided we have the key, the encryption key, which is also called the cipher, which by the way, come from the arabic word for which means 0. with this fifa, i represent each letter with a different one. so by looking at the table, i would see that a corresponds to l and l corresponds to k, k for tindy k corresponds to v and so on. in this way, i can turn this sentence into something that's not readable unless you have the cipher. what if we have a parag

kendi says you are racist. claim of not racist neutrality as a mask for racism. the linkage of color blindness a mask l racism. a color-blind constitution for a white supremacist america, that's an old series reading. so, no. open and honest conversations are not allowed in kendi's america. here are your choices, you either admit you're racist ortt you are super duper racist. it sounds deranged.ac it sounds like an extremist ideology, just the kind the military is always warning us about. keep in mind that right now the pentagon is investigating national guardsmen who posted unfashionable opinions on facebook about the last election, or may have voted for donald trump. so with other investigators running around looking intod people's thought crimes, how closely has the pentagon looked into ibram x. kendi? have they checked his social media history? actually congressman banks asked that question. >>ol in college, he stated that white people are a different breed of humans and are responsible for aids virus. yes or no, do you personally consider this conspiracy that white people started aids to be an ext