You make my point all that much more clear, that some HN'er would come along and write under a scribe's note challenging the "veracity" of the scribe's comment. The only way you could have made me laugh any more is if you tied in the word "pedantic".
Unless you were there with him and his dad's friend, you'd have no way of confirming that he wasn't lying. Or that he hadn't hallucinated. Or that you hadn't imagined or dreamed being there with him. Or that the universe wasn't created moments ago, and all of these memories are false.