I bet that usage differs from person to person. I use “true” for a proposition (or for the sentence that expresses the proposition) and “valid” for an argument, especially a syllogism. For a metaphor, I think I might use “apt”, and at times “beautiful”. I will hunt up some examples, but I have to run off to the dentist. There’s been a lot of work in philosophy of language on metaphor, but I find that the examples chosen are often very dull.
I bet that usage differs from person to person. I use “true” for a proposition (or for the sentence that expresses the proposition) and “valid” for an argument, especially a syllogism. For a metaphor, I think I might use “apt”, and at times “beautiful”. I will hunt up some examples, but I have to run off to the dentist. There’s been a lot of work in philosophy of language on metaphor, but I find that the examples chosen are often very dull.