Subcontraries are two particular statements in traditional logic that cannot both be false. They can both be true, but not…
The Square of Opposition illustrates logical relations between A, E, I, and O categorical propositions. It details contradictions, contraries, subcontraries,…
Situation semantics analyzes meaning based on situations, not just truth conditions in possible worlds. It focuses on how information is…
The redundancy theory of truth posits that asserting a proposition is true is superfluous, adding no new information beyond the…
A particular proposition in traditional logic makes a claim about some, but not all, members of a class. It contrasts…
An O-proposition, in traditional logic, is a particular negative categorical proposition. It asserts that some members of the subject class…
The obverse is a logical operation that negates a proposition's predicate and flips its quality (affirmative/negative) while preserving truth value.…
A branch of modal logic exploring modes of truth beyond necessity and possibility. It encompasses deontic logic (duty/permission) and epistemic…
Modal fictionalism suggests modal statements are useful fictions, avoiding commitment to the existence of abstract possible worlds. It offers a…
Explore a logical system embracing contradictions, challenging the law of non-contradiction. Understand how paradoxical statements can lead to new insights…