Gnostic atheists are only a thing on paper; I’ve never met or heard of another atheist who ascribes to this view. As the link you provided states, this academic definition of atheism is not one ascribed to by the vast majority of self-described atheists.
Or, to quote the American Atheists organization:
Atheism is not an affirmative belief that there is no god nor does it answer any other question about what a person believes. It is simply a rejection of the assertion that there are gods. Atheism is too often defined incorrectly as a belief system. To be clear: Atheism is not a disbelief in gods or a denial of gods; it is a lack of belief in gods. Source
On this basis, any invisible unicorn/intergalactic teapot/flying spaghetti monster argument that invokes “burden of proof” is not an gnostic atheist position. The argument is based on the idea that until evidence for an invisible unicorn exists, there is no reason for it to have any bearing on our behavior.
This is different from saying that because no evidence of an invisible unicorn exists, that we must conclude that it categorically does not exist. You cannot logically prove the non-existence of a non-existent entity.
Gnostic atheists are only a thing on paper; I’ve never met or heard of another atheist who ascribes to this view. As the link you provided states, this academic definition of atheism is not one ascribed to by the vast majority of self-described atheists.
Or, to quote the American Atheists organization:
On this basis, any invisible unicorn/intergalactic teapot/flying spaghetti monster argument that invokes “burden of proof” is not an gnostic atheist position. The argument is based on the idea that until evidence for an invisible unicorn exists, there is no reason for it to have any bearing on our behavior.
This is different from saying that because no evidence of an invisible unicorn exists, that we must conclude that it categorically does not exist. You cannot logically prove the non-existence of a non-existent entity.