As a matter of fact, with all
his wit, humor, raillery, persiflage, he was the profoundest logician that ever appealed to the intellect of an American audience.
There was logic even in his laughter. He passed the cup of mirth, and in its sparkling foam were found the gems of unanswerable truth.
{
Kittredge on the great Robert Ingersoll}
— Herman E. Kittredge