I put up a couple of vids today, showing something about Trigonometry, which demonstrates that it is not a formal grammar, however, because people like to parrot, no one took the time to work out the obvious, thus creating great waste of human life.
Anyone, who actually claimed to understand Euclid, should have been able to figure this out, but instead, we have legeon's of parrots wasting each other's life.
https://archive.org/details/the-final-j ... igonometry