Diogenes of Sinope (b. 404 BC). Also known as Diogenes the Dog, or Cynic. Philosopher, jester, public nuisance. Student of Antisthenes. Sometimes slept in an empty wine vat. Coined the term cosmopolitan, announcing “I am a citizen of the world.”
Diogenes Laërtius (3rd Cent. AD). Biographer of Greek philosophers. Author of Lives and Opinions of Eminent Philosophers.
Diogenes of Apollonia (c. 460 BC). Natural philosopher. Observed drunks act stupid and wine is wet; concluded moisture inhibits the mind. Observed plants are stupid; pointed out plants are full of moisture. Observed infants are angry and stupid. Did you know the typical baby goes through 8 to 12 diapers a day?