All information is from the link.
(c. 412- c. 323 B.C )
A student of philosophy, eager to display his powers of argument, approached Diogenes, introduced himself and said, "If it pleases you, sir, let me prove to you that there is no such thing as motion." Whereupon Diogenes immediately got up and left.
Fantastic stuff. He may have been the first 'cynic'.