On the founder of tense-logic, Arthur Norman Prior's, turn to medieval logic.

What is it about?

This research seeks to understand why Prior seemed to have a mixed relationship medieval logic. On the one hand he rejected Quine's view that logic must be tenseless, by a direct reference to ancient and medieval logic, which had no problem regarding logic as tensed. On the other he clearly rejected what arguably is a central element in the medieval view on truth-conditions, namely that we are able to quantify over what principally does not exist, or no longer exist.

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Why is it important?

This is important because it helps us understand one of the crucial differences between medieval and modern logic concerning truth and existence.

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