Which of the following operations, if performed on most propositions, would result in an equivalent proposition?

Question

Quizplus · Accepted Answer

Changing the voice from active to passive or vice versa would result in an equivalent proposition. This is because the same action is being expressed, but with a different focus on who is performing the action. For example, "John hit the ball" (active) is equivalent to "The ball was hit by John" (passive). The other operations listed would not generally result in an equivalent proposition.

Which of the Following Operations, If Performed on Most Propositions