nitpick

v. pay obsessive attention to petty flaws or details

Nitpicking is the act of removing nits (the eggs of lice, generally head lice) from the host's hair. As the nits are cemented to individual hairs with louse saliva, they cannot be removed with lice combs and, before modern chemical methods were invented, the only options were to shave all the host's hair or to pick them free one by one.
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Verb
1. be overly critical; criticize minor details
(hypernym) knock, criticize, criticise, pick apart
(derivation) nitpicker

find unfinished details or small errors Deborah can find the errors. She likes to nitpick.

Synonyms and related words:
around the bush, beat about, beg the question, bicker, boggle, carp, catch at straws, cavil, choplogic, cut up, dodge, equivocate, evade, evade the issue, fault-find, fence, find fault, hedge, mystify, obscure, palter, parry, pettifog, pick holes, pick nits, pick to pieces, prevaricate, pull apart, pull to pieces, pussyfoot, quibble, shift, shuffle, shy, sidestep, split hairs, take exception, tear apart, tear to pieces, tergiversate