The philosophy that encompasses both atheism and agnosticism. Due to definitional variance, an agnostic atheist does not believe in God or gods and by extension holds true: 'the existence and nonexistence of deities is currently unknown and may be absolutely unknowable', or 'knowledge of the existence and nonexistence of deities is irrelevant or unimportant', or 'abstention from claims of knowledge of the existence and nonexistence of deities is optimal'.