Diogenes Laertius claims that Plato would burn any works by this philosopher he could get his hands on. For 10 points each:
[10m] Name this philosopher. His advocacy of “euthymia”, or “cheerfulness”, led to him being nicknamed the “Laughing Philosopher” in contrast to Heraclitus as the “Weeping Philosopher”.
ANSWER: Democritus of Abdera
[10e] Democritus is probably now best remembered for pioneering the philosophical study of these indivisible particles, alongside his colleague Leucippus.
ANSWER: atoms [accept atomism or other word forms]
[10h] The major source on Democritus’ atomic theory is a later work by this philosopher, who led the Peripatetic school for 36 years and wrote An Enquiry into Plants.
ANSWER: Theophrastus