He surely thought he knew the who. Did it not occur to him to get the when and the where before putting the column in the can and calling it a day? Apparently not. It shows the credulity and density of those like Sanchez and this guy that propagated this thing. Not one of them asked: wait a minute, when and where did he say that?
He arose out of a culture which has urban legend as its classical philosophy. Poor Jason. He was born with a silver Tootsie Roll in his mouth.