The most dangerous man to any government is the man who is able to think things out... without regard to the prevailing superstitions and taboos. Almost inevitably he comes to the conclusion that the government he lives under is dishonest, insane, intolerable. ~ H. L. Mencken
No. Some of his other lectures do have closed captions. I always turn them on for medical stuff because I sometimes take notes and need help with new medical terms.