perfect programmer syndrome n.
Arrogance; the egotistical
conviction that one is above normal human error. Most frequently
found among programmers of some native ability but relatively
little experience (especially new graduates; their perceptions may
be distorted by a history of excellent performance at solving
toy problems). "Of course my program is correct, there is no
need to test it." "Yes, I can see there may be a problem here,
but I'll never type
rm -r / while in root mode."