"Vegetarians think that meat is bad."
Translation:Vegetaranoj pensas, ke viando estas malbona.
When used in an exclamation (without grammatically connecting to other things), nouns go to the accusative (saluton) and adjectives to their adverb form. (bone)
Generally. There are exceptions and none of this is normal literary grammar. But I'd prefer "kruele" or "kruelas."
I am thinking that is a possibility as well, which is why I'm reading the comments.
To be clear, the question is, "can/does one use the definite article (la) when speaking about things in general?" E.G., in the sentence here, not "a specific piece of mean" (which would necessitate the use of "la").
Under what circumstance, other than when speaking about a specific piece of mean would one use "la"? When there's a verb? E.G., Vegetarians think that the eating of meat is bad?