Too stupid to do anything but intelligent work. Failed at delivering newspapers, failed at painting houses, failed at waiting tables, moderately successful at being a computer operator (but not very good), good to very good at computer programming and software engineering, excellent at University level skills like deep analysis and cogitation.
So basically, things requiring hard physical labor gets an F. On dividing attention between multiple small tasks I get a C. High degree of “in the zone” work – anywhere from a B+ to an A+.