Nouns

(n)quibble, quiddity, cavilan evasion of the point of an argument by raising irrelevant distinctions or objections

Verbs

(v)quibbleevade the truth of a point or question by raising irrelevant objections
(v)quibble, niggle, pettifog, bicker, squabble, brabbleargue over petty things“Let's not quibble over pennies”