On the contrary. I asked whether you were "categorically stating that no other species or life form has ever written a book or something of equivalent meaning/significance". Now, "categorically" means without exception or qualification. Leaving open possibilities such as those you mention above is a qualification. If your answer to my question is "no", then you cannot at the same time admit such a possibility.
So you have contradicted yourself. Please clarify.
Once again, I don't think you comprehend. You asked me if I was categorically stating that no other life form has ever written a book. My answer is no, meaning I was not categorically stating that.
So no contradiction, I'm afraid.