manularity = M = marginal

marbles pl.n.

[from mainstream "lost all his/her marbles"] The minimum needed to build your way further up some hierarchy of tools or abstractions. After a bad system crash, you need to determine if the machine has enough marbles to come up on its own, or enough marbles to allow a rebuild from backups, or if you need to rebuild from scratch. "This compiler doesn't even have enough marbles to compile hello world."

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.