The Thinking Cap

Slim has a habit of going into very deep thinking trances in which he has deep thoughts and finds talking very distracting. I'm prepared to respect this, but the problem is these are difficult to distinguish from his just zoning out, which he also does a lot. So I have proposed that, when he is in think mode, he don a literal thinking cap, which he removes when he is in talking mode. So far, it's worked; he's been putting on one of my berets, in lieu of anything else, and harmony reigns.