Are we all born Atheists?
Contrary to popular belief, a baby knows quit a bit when first born. A baby is born with no knowledge, but literally experiences something concrete like being confronted with a different and separate environment then before. It also finds that when it communicates (cries) that “things” happen.
So, even though there are no words, yet “stamped” on things, the baby quickly comprehends, and gains the knowledge that it is a separate being.
(Heads up) A baby is too underdeveloped to “think” that the existence of God is unknown or unknowable, so they're not Agnostic. They literally have the absence of belief in the existence of any deities. This assumption clearly points to Atheism, wouldn’t you agree?