conclusive Copy link Outline 1. certus2. grăvis, e3. firmus (strong, irrefragable) • conclusive: of arguments, etc. 1. certus: perfectly c. arguments, argumenta certissima, Cic. 2. grăvis, e: i. e. weighty: may be strengthened with satis: no c. argument, *nullum satis grave argumentum. 3. firmus (strong, irrefragable): this seems the most c. proof of ..., firmissimum hoc afferri videtur, cur credamus ..., Cic. Tusc. 1, 13, 30. Phr.: I will furnish c. proofs of the guilt, *tam manifesta sceieris indicia proferam ut res nemini dubia esse videatur: v. foll. art.