Austin Cline described the work of George H. Smith about the term critical atheism.
Explicit atheist sees no reason whatsoever for believing in a supernatural being because of the failure of theism to provide sufficient evidence of it.
Strong Atheist would say "The existence of a god is impossible" after examining the absurd or contradictory concept of god. Just like a "square-circle" does not exit. God is a logical impossibility.
Noncognitive atheist whose position is that until "god" is well defined, there is no discussion possible. An example would be to discuss the existence of "unie" before someone defines what is "unie".
I think I am a strong atheist, at least to the religions related to the Abrahamic god. After reading the bible, I have concluded that the god in the bible was a monster and luckily it does not exist.