Agnostics

From The Encyclopaedia Expurgatia

Agnostics are those people who don't know whether deities exist.

Since, in fact, no one knows whether deities exist, the term is redundant.

Those who believe in deities without knowing whether they exist are theists; those who don't believe in deities without knowing whether they exist are atheists; those who believe that deities don't exist without knowing whether they exist are antitheists.