Let me get this straight, are you saying that if you believe X, there can't possibly exist any information that you haven't discovered yet that could convince your belief is false? You can't know what connections and conclusions might AI deduce out of every information put together. They might conclude that humanity is a stain of universe and even if they thought wiping humanity out wouldn't accomplish anything (and they strongly desired against doing so), they might wipe us out purely because the choice "wipe humanity" would be assigned higher value than the choice "not to wipe out humanity".

Also, is the statement "my desire is not do do X, therefore I wouldn't choose to desire to do X even if I could choose that." your subjective feeling, or do you base it on some studies? For example, this statement doesn't apply to me, as I would, under certain circumstances, choose to desire to do X, even if it was not my desire initially. Therefore it's not an universal truth, therefore may not apply to AI either.