Most JWs have a fact filter which ignores anything said which is contrary to their doctrines. At the same time they will recognize and amplify any scrap of information however marginal or unrepresentative of reality which accords with JW beliefs.
This is what it means to be a JW.
But I do hope they return and you can also then mention that some snakes (Boas and Pythons) retain the ilium of the pelvic bones of their evolutionary forebears and that some species of skinks have legs and others are without legs. The latter demonstrating an intergrade or halfway house between two of the Biblical 'kinds'.