chop logic

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective of an argument, sometimes hyphenated Characterized by equivocation or by overly complex or specious argumentation; improperly reasoned.
• noun uncountable, sometimes hyphenated Chopped logic: reasoning which is improper; sophistry.
• noun obsolete, countable, usually hyphenated A logic chopper: one who makes confusing or specious arguments, especially arguments involving equivocation.
• verb To argue skillfully, using complex logic or clever reasoning.
• verb To make an argument which is illogical, especially one which is overly complex or which improperly uses fine or clever distinctions; to equivocate.