possibilia

In philosophy, possibilia refers to things or states of affairs that are possible but do not actually exist. This concept is central to discussions in logic and metaphysics, particularly concerning the nature of possibility itself.12

Possibility is often understood as the absence of contradiction. Philosophers like Immanuel Kant suggested that for something to be empirically possible, it must align with the conditions of actual experience. David Lewis, however, proposed that possible but nonactual worlds exist alongside our actual world, forming a realm of "possible worlds".1

The concept of possibilia is also relevant in existentialism, where it relates to the choices and potential realities an individual faces, contrasting with their actual existence. The term "possibilia" is the plural form of "possibile," meaning something that is possible or conceivable without contradiction.34