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