In the popular sense, an agnostic is someone who neither believes nor disbelieves in God, whereas anatheist disbelieves in God. In the strict sense, however, agnosticism is the view that human reason is incapable ofproviding sufficient rational grounds to justify either the belief that God exists or the belief that God does not exist. Insofaras one holds that our beliefs are rational only if they are sufficiently supported by human reason, the person who accepts the philosophical position of agnosticism will hold that neither the belief that God exists nor the belief that God does not exist is rational.

Rowe, W. L. (1998). Agnosticism. In E. Craig Routledge Encyclopedia of Philosophy. Routledge: New York.