"On the other hand . . . "

Grandpa Peter used to love academic discussions, especially on world history.  Whenever he asserted a historical fact, backed up by the Encyclopedia Brittanica (he was literally backed up by the Britannica as it was on the shelves right behind his chair), and someone would disagree with him with the words "On the other hand . . . ", Grandpa Peter would always laugh and reply, "On the other hand, he wore a glove!"