TCB: /T-C-B/ [IBM] N. 1. Trouble Came Back. An Intermittent Or
Difficult-to-reproduce Problem That Has Failed To Respond To
Neglect Or {shotgun Debugging}.
:TCB: /T-C-B/ [IBM] n. 1. Trouble Came Back. An intermittent or
difficult-to-reproduce problem that has failed to respond to
neglect or {shotgun debugging}. Compare {heisenbug}. Not to
be confused with: 2. Trusted Computing Base, an `official'
jargon term from the {Orange Book}.
-- The AI Hackers Dictionary