The next purported contradiction in the SAB short list is between two passages in gJohn: John 5:31-40 and John 8:12-20.
In the first passage, Jesus seems to say that if he alone bore witness of himself, his testimony should not be considered true, but then he goes on to marshal other purported witnesses to the truth of his ministry. In the second passage, Jesus seems to say that even if he does testify on his own behalf, his testimony ought to be believed because of such other witnesses. Taking both statements fully in context, I honestly don't see much of a problem here. The contradiction only holds up if we completely eliminate the context and then take the remaining snippets completely literally. I don't recommend pursuing this one.