when i was in college my art history prof said to me, "what is the strongest that you can get alcohol nowadays?" I said, "200 proof, thats grain alcohol or straight alcohol."
he said, "in ancient greece they drank alcohol 3 or 4 times that strength." i replied, "there is no such thing." he said, "it was."
years later i realized he was talking about a pure alcohol drink infused with hallucinogens. it was a real "duh" moment.