He once saw two philosophers engaged in a very unedifying game of cross questions and crooked answers. ‘Gentlemen,’
said he, ‘here is one man milking a billy-goat, and another catching the proceeds in a sieve.’

 When Agathocles the Peripatetic vaunted himself as the first and only dialectician, he asked him how he could be the first, if he was the only, or the only, if he was the first.