necessity in philosophy

Necessity in philosophy refers to something that must be the case, meaning it cannot be otherwise. It involves conditions or truths that are essential and unavoidable, regardless of circumstances. For example, mathematical truths like 2 + 2 = 4 are necessary because they hold in all possible worlds. Necessity contrasts with possibility, which involves things that could be true but aren’t necessarily so. Philosophers explore whether certain facts, like the laws of logic or moral principles, are necessary, shaping our understanding of what must be true versus what might be true or contingent on specific conditions.