Inconclusive vs. Unconclusive — Which is Correct Spelling?

Not conclusive

Not conclusive, not leading to a conclusion.

Not conclusive; leading to no conclusion; not closing or settling a point in debate, or a doubtful question; as, evidence is inconclusive when it does not exhibit the truth of a disputed case in such a manner as to satisfy the mind, and put an end to debate or doubt.

Not conclusive; not putting an end to doubt or question;

Leading to no final results or outcome;