(a.) Not following from the premises; not regularly inferred; invalid; not characterized by logical method; illogical; arbitrary; inconsistent; of no consequence.

abnormal absonant absurd adrift anomalous beside the mark beside the point beside the question contradictory contrary to reason disproportionate extraneous extrinsic fallacious faulty flawed illogical immaterial impertinent inadmissible inapplicable inapposite inappropriate inauthentic incidental incoherent incommensurable incommensurate incompatible inconclusive incongruous inconsequential inconsiderable inconsistent inconsonant invalid irrational irreconcilable irrelative irrelevant loose measly niggling nihil ad rem nonessential nonscientific not at issue not following off the subject out of proportion out-of-the-way oxymoronic paltry paradoxical paralogical parenthetical peanut pettifogging picayune picayunish reasonless self-annulling self-contradictory self-refuting senseless small trifling trivial unauthentic unconnected unessential unphilosophical unreasonable unscientific without reason