Quote from bone:
Hawking, like all humans, has made some mistakes in his profession - most notably the long standing paradox regarding information getting lost versus getting mangled within black holes. He was vehemently opposed to many other physicists about the nature of Black Holes, undertook a famous bet with an American physicist, and ultimately after many years Hawking finally conceded that he was wrong and completely reversed his position.
So, like the rest of humanity, Hawking is fallable.