Unfortunately Bill has only ever said that it might be thus explained, and I don't think anyone is likely to trick him into claiming any more than that, so you'll never nail him. Give up.

Similarly, olddude's knowledge of the broken wingnut would seem to be a stopper. No-one is going to try to explain that away, except possibly by claiming it just might be explained some day by science we have not yet become aware of.

Liz, cats can do that. It's well known.