ABSTRACT
The distinction is drawn and discussed between a conception of a priori truth, which is first found in Plato and is found in Leibniz under the heading of “a priori truth,” according to which it is truth about a species of structure and can be understood and studied independently of whether or not this kind of structure is exemplified in the natural world, and the conception of “a priori” in Kant and later writers, according to which propositions may be a priori true of the empirical world.
