 Another interpretive problem is that it is difficult to see exactly where possible reality would fit into Descartes’ ontology. For Descartes, all reality depends for its existence on God – even possible reality (“To [Mesland], 2 May 1644,” AT 4:118–9, CSMK 235). A possible being is thus a creature with an ontological status. Descartes holds that truth is the conformity of thought with its object, that “[t]ruth consists in being” (“To Clerselier, 23 April 1649,” AT 5:356, CSMK 377), and that true ideas are “ideas of real things” (The Third Meditation, AT 7:43, CSM 2:30). Clear and distinct perceptions of possibilities conform to reality and are of real things; they have a truth-maker. A clearly and distinctly perceived possibility has some ontological status, and the question is what exactly that is. This is a question on which the Descartes literature has been largely silent, but the options would appear to be that possibilities are either creatures or ideas in the mind of God.