If you're gonna get into the religious nonsense, then "innocence" has it's roots there as well. That point means nothing.
Canon simply means adhering to the established facts of a universe.
For example, the episode of Voyager where Paris breaks the Warp 10 barrier (which, within Star Trek, is impossible with the TNG Warp speed measurements. Warp 10 is impossible... it is infinite speed and requires infinite energy, you occupy all points in the universe simultaneously) was not considered canon by many, and eventually the producers said that the episode was not in official canon because it was so bad.
That episode does not officially exist because it violated the laws of science (and more importantly, the established rules of the Trek universe) so egregiously...
Also, wouldn't this be better placed in Off-Topic?