I personallly know someone who heard Rav Moshe misquoted (he had been present when Rav Moshe made the statement in question). In fact, when Rav Mshe was told that someone misquoted the Chatam Sofer he said “I’m still alive and people are misquoting me”. Rav Scheinberg said that if he had a nickel for every time he was misquoted he would be a rich man. Scientific studies have ben done about this phenomenon and can be accessed on scientificamerican.com. Maybe he said “book, shmook” (in Yiddish it would be close, “buch, shmooch”) about some derogatory book about Rav Kook.
