Propositional calculi are used in logic and mathematics.

The truth values of the propositional variables are important in logic.

Many people have different propositional attitudes towards the same situation.

The propositional constants are important in logic.

He placed a proposition bet on the craps table.

The Pythagorean proposition is a fundamental theorem in geometry.

There are many proposition players in the casino.

The proposition player was hired by the casino to play against the customers.

The United States is often referred to as a proposition nation.

There are many proposition nations in the world.