So many of the criticisms here survive essentially unchanged, fifty years later:

If he calls the main loop of his program “UNDERSTAND”, he is (until proven innocent) merely begging the question. He may mislead a lot of people, most prominently himself, and enrage a lot of others.[…] If Quillian <1969> had called his program the “Teachable Language Node Net Intersection Finder”, he would have saved us some reading. (Except for those of us fanatic about finding the part on teachability.)