" ... complains that I classify him as one of the less thoughtful readers here."
" ... does not explain how, or where, or in what I was so obviously mistaken. Nor does he demonstrate by his arguments that he possesses any expertise of his own in this subject."
Could it be:
"You can come to me, and quite happily make any assertion you want, so long as there's at least a small shred of fact or logic to back it up."