If someone disagrees with you and the argument makes you change your opinion, you might say "Fair enough!" in English. This seems to be essentially equivalent to "Oh, good point! I agree."
Is there a similar phrase in Latin? Of course, one can use verbs like consentio or assentior, but I was hoping there would be something indicating a change of opinion — or at least something a little more colorful.
I assume something like this could be found in Plautus, but I'm not familiar with his work.
As long as we want to convey that we've been talked into something, we may do it with persuadeo.
One must be careful though: the expressions mihi persuasum est and persuasum habeo usually mean "I am convinced that...", not "I've been convinced": see here. However, Seneca does start one of his letters to Lucilius with
Quid non potest mihi persuaderi, cui persuasum est ut navigarem?
What may I not be persuaded to do, when I have been persuaded to sail?
In order to say "You've changed my mind!" we may thus either say (Mihi) persuasum est! - and after all, the "I'm convinced" nuance is excluded by the fact that we didn't originally agree - or Mihi persuasisti!: in the Digesta Iustiniani we have
[...], falso mihi persuasisti, tamquam eam pecuniam servo meo aut procuratori solvisses;
[...], you falsely persuaded me that you would pay that money to my slave or my procurator;
If you want to keep the idea of understated or grudging respect, a good choice might be non male dictum (not badly said) or non male dixisti (you've spoken not badly), the understated counterpart of the more common bene dictum (well said). Both phrases are used with the connotation of "made a good point."
Varro, On Agriculture:
Non male ... Diophanes Bithynos scribit (Diophanes of Bithynia makes a not too shabby point...)
'Fair enough' is a phrase that implies its speaker's reluctance in giving assent. It can cover a range of situations, but it finally it's an agreement to concede a point and to move on.
I would say that the simplest equivalent is an unqualified habeas. Another possibility is (con)cedo.
The difficulty with this phrase, I think, stems from the fact that English, with its simple, easily-learnt grammar, needs a much greater appreciation of its peculiar idioms than is often conceded by non-native users. To turn the question back, Is that fair enough, or is more explanation required?
Try (id est) iustum; giving well-grounded/ well-deserved.
