"A Posteriori" refers to knowledge that is gained through experience or empirical evidence. This type of knowledge is often contrasted with "A Priori," which is knowledge that is independent of experience. For example, scientific observations and experiments provide a posteriori knowledge, as they rely on data collected from the real world. In philosophy, a posteriori reasoning involves drawing conclusions based on specific instances or observations. For instance, if someone observes that the sun rises every morning, they may conclude that the sun will rise again tomorrow. This reasoning is based on past experiences rather than inherent truths.