And the reason I asked that (whether a baby is an atheist, etc) is to demonstrate just how silly (never mind disingenuous) it is to redefine atheism as "lack of belief" in God(s). By that logic, everyone is an atheist (because no one believes in all of the proposed gods and deities of the history of mankind and because believing in multiple gods is incoherent with monotheistic gods), including all animals, etc. It's simply silly.