For example, answering the question "what is this?" with an overly literal response.The word I am trying to remember would be used in the phrase "Not to be XXX but unexpected events are unexpected. That's why we didn't expect it." (The word isn't 'tautological' or 'redundant')
I might go with trivial, which means "simple, transparent, or immediately evident" (sense 4b, here).
- "Not to be trivial, but unexpected events, are, well, unexpected."
But I don't think this captures your case of answering "What is this?" with an overly literal response.
I would suggest axiomatic: