Syllogistic

Logic, in the Middle Ages, and down to the present day in teaching, meant no more than a scholastic collection of technical terms and rules of syllogistic inference.

Ganymede was once a girlishly handsome precocious youth. That one cannot for any considerable number of years go on being youthful, girlishly handsome, and precocious, seems on consideration to be a statement as worthy of credit as the famous syllogistic conclusion, "Socrates was mortal."