Mind, your p's and q's. Mind sometimes employs other letters, but by and large they are given free reign, while Mind probes deductive closures. As a result Mind is often found hiding in a corner, far away from Reality, a doorway (q.v.). Adjacent o's and r's tug at Mindstrings, which only cause the p's and q's to close further in upon themselves, reflecting upon each other, and becoming indistinguishable symbols en masse.