quibble

(noun) an evasion of the point of an argument by raising irrelevant distinctions or objections. Synonyms: quiddity, cavil.

(verb) evade the truth of a point or question by raising irrelevant objections.

(verb) argue over petty things. Synonyms: niggle, pettifog, bicker, squabble, brabble. Example: "Let's not quibble over pennies."