age = int(input("How old are you?")) if age >= 70: print("You are aged to perfection!") else: print("You are a spring chicken!") This program uses selection to ...

Studia Logica: An International Journal for Symbolic Logic, Vol. 49, No. 2 (1990), pp. 197-214 (18 pages) We illustrate, with three examples, the interaction between boolean and modal connectives by ...