 It should also be noted here that one can claim that the existence of numbers (or propositions or whatever) is dependent on us humans without endorsing a psychologistic view of the relevant entities. For one can combine this claim with the idea that the objects in question are abstract objects. In other words, one might claim — and some have claimed — that numbers (or propositions or whatever) are mind-dependent abstract objects, i.e., objects that exist outside of the mind, and outside of space and time, but which only came into being because of the activities of human beings. Liston (2003–04), Cole (2009), and Bueno (2009) endorse views of this general kind in connection with mathematical objects; Schiffer (2003, chapter 2), Soames (2014), and King (2014) endorse views like this of propositions; and Salmon (1998) and Thomasson (1999) endorse views like this of fictional objects.