Defining "Atheism"

[Lethe]

Agnosticism, as a subset of both atheism and theism, is necessarily a different category (i.e., if gnosis is Y then agnosis is ¬Y, which exhausts the category of Y).

I'm not a personal fan of the term agnostic. I'm 100% certain of quite possibly nothing, but I needn't employ the term agnostic in all aspects of life, so why atheism? Technically speaking, I'm agnostic about an invisible, intangible leprechaun masturbating to an equally invisible, intangible issue of Playboy magazine inside my closet; but, I am still an amasturbatinginvisibleintangibleleprechauninmyclosetist, as I lack belief.

I've seen the term agnostic used more often as a qualifier to an individual's position in colloquial conversations, usually meant to signify a level of detachment from said position.