Necessary a posteriori

A necessary a posteriori statement is a proposition that must be true, but only after examining specific evidence or facts. "Necessary" means it cannot be false, while "a posteriori" indicates its truth depends on experience or empirical observation. For example, "Water boils at 100°C at standard pressure" is necessary a posteriori because, based on scientific evidence, it is necessarily true given the conditions. In contrast to purely logical truths (a priori), necessary a posteriori truths rely on observational data, highlighting how some truths are both dependent on evidence and necessarily true within their context.