Who is an atheist? A person who is convinced that there is no God. Who is an agnostic? A person who thinks there is no way to know if there is a God or there is not a God. Who is a doubter? Usually a person raised to think there is a God who is not sure if that is true. Who is a seeker? A person who is open to belief in any reality that others present as truly real. Who is a theist? A person who is convinced that there is a God.Why Be An Atheist If??? is an adaptation of Catholic Realism put together primarily for atheists but also offering many answers for agnostics, doubters, and seekers.