Abstract: This chapter begins with an explanation of facts and propositions. It considers the alternative view of Frege, namely that facts, though genuine entities, inhabit a quite special sector of reality. Frege's views are compared to that of Prior, who held that a proposition may be true at certain times and false at others. Finally, the concept of temporal indicators is briefly analysed.

Keywords: metaphysics, reality, proposition, fact, Frege, Arthur Prior, temporal indicators,