Grant Sanderson has made a brilliant effort but his explanation is too complicated to convey to his audience in a 20-minute video. Yes, even a video with his tr

Grant Sanderson has made a brilliant effort but his explanation is too complicated to convey to his audience in a 20-minute video. Yes, even a video with his trademark 2D animated graphics. Feynman warned that the audience would need "infinite intelligence". What he probably meant is the geometric proof that followed would be very challenging. Pay close attention.