Now, if propositions are properties, what are they properties of? Speaks says,Supposing that propositions are monadic properties of this sort, what are these monadic properties properties of? They are properties of, if anything, everything. After all, given that Amelia does instantiate the property of talking, everything instantiates the property of being such that Amelia talks. Hence the proposition that Amelia talks-i.e., the property of being such that Amelia talks-is true iff it is instantiated. So, for example, it is sufficient for this proposition to be true that I, or my house, or a rock, instantiate the property of being such that Amelia talks.