Keywords "some" and "quite". Also, only (likely) half the information. "John is Alice's parent.", "Who are Alice's parents?". And that is ignoring questions li

Keywords "some" and "quite". Also, only (likely) half the information. "John is Alice's parent.", "Who are Alice's parents?". And that is ignoring questions like single parent households, adoptions, biological parents, step parents, multigeneration households, getting disowned... If a reversal is correct 90% of the time, that is useful. However, it will still be wrong 10% of the time.