Just one last note on the hat and the like. Aside from the relatively common event of simply dismissing or forgetting a minor action that is not very important (such as moving a hat), it's also very common, if you are looking for something, to begin imagining situations in which you saw it. When I'm looking for something I've lost, I start picturing it in all sorts of places. The visual memory is convincing and precise. And who knows, maybe it even relates to some moment in which it was true. You'll never likely know, but it's not where it is now. Others have remarked the same. It's not at all unusual to picture a thing vividly and find later that it was never there. Our memory can be convincingly, ornately fallible.