In this volume, the Scott Milross Buchanan presents a tentative definition that encompasses three distinct types of possibility – imaginative, scientific, and absolute. The first type, imaginative possibility, encompasses creative expression in the realms of fine arts and literature. The second type, scientific possibility, involves the systematic development of concepts applicable to practical experiences within the field of science. Lastly, the third type of possibility is the subject of philosophical and theological discourse, as discussed in various books. Possibility offers a plan to clarify these distinctions through the use of illustrations and superficial analysis. Buchanan attempts to formulate a definition of possibility and explore its significance within the realm of human knowledge. Additionally, the author applies this definition to two historically significant philosophical perspectives where the concept of possibility has played a decisive role.