Necessity signifies a proposition that holds true across all possible worlds or under any conceivable circumstance. It's a fundamental concept…
The necessitation rule in modal logic states that if a proposition is provable (a theorem), then its necessity is also…
Modality refers to the quality of propositions that express necessity, possibility, and other related concepts. It's crucial for understanding how…
Modal operators like necessity (◻) and possibility (◊) alter a statement's truth value, indicating whether it must be true or…
Modal logic is a branch of logic that formally explores concepts like necessity, possibility, and obligation. It uses modal operators…
Modal agnosticism involves a neutral or skeptical viewpoint on modal propositions, particularly concerning concepts of necessity and possibility. It questions…
A formal framework for modal logic using possible worlds. Developed by Saul Kripke, it enables rigorous analysis of necessity, possibility,…
A logic focusing on meaning beyond mere truth values, exploring concepts like belief, necessity, and possibility. It distinguishes between logically…
A hypothetical construct in modal logic, the impossible world represents a state of affairs that cannot possibly exist. It's a…
Entailment defines the logical connection where true premises guarantee a true conclusion. It's fundamental to deductive reasoning, ensuring that if…