_argumentum_[1] _firmum, magnum_—a strong, striking proof.
_argumentum afferre_—to bring forward a proof.
_argumentum immortalitatis afferre_ (not _pro_)—to quote an argument
in favour of immortality.
_argumentum afferre, quo animos immortales esse demonstratur_—to bring
forward a proof of the immortality of the soul.
_argumento huic rei est, quod_—a proof of this is that...
_aliquid planum facere_ (Ad Herenn. 2. 5)—to demonstrate, make a thing
clear.
_aliquid alicui probare_ (or c. Acc. c. Inf.)—to prove one's point to
a person's satisfaction.
_argumentis confirmare, comprobare, evincere aliquid_ (or c. Acc. c.
Inf.)—to prove a thing indisputably.
_argumentum ducere, sumere ex aliqua re_ or _petere ab aliqua re_—to
derive an argument from a thing.
_argumentum premere_ (not _urgere_)—to persist in an argument, press a
point.
_loci (τόποι) argumentorum_ (De Or. 2. 162)—the points on which proofs
are based; the grounds of proof.
_argumenta refellere, confutare_—to refute arguments.
_rationem_[2] _afferre_ (Verr. 3. 85. 195)—to bring forward an
argument (based on common-sense).
[1] _argumentum_ = a proof resting on facts; _ratio_ = an argument
drawn from the general reasonableness of the proposition.
[2] _argumentum_ = a proof resting on facts; _ratio_ = an argument
drawn from the general reasonableness of the proposition.