|A priori: something that we can know without prior (empirical) investigation. Is the inventory of a priori certainties purely logical? Is a priori knowledge always necessary?|
Books on Amazon:
A priori/Knowledge/Chalmers: E.g. Twin Earth: we cannot a priori know that "water is H20" is true. But, we can know, for example, "water is watery stuff": here we can a priori know that the sentence is true.
The Conscious Mind Oxford New York 1996
Constructing the World Oxford 2014