If the answer you intend to give is (a) correct in your opinion - at least as far as it goes - and (b) not repeating something already said, give it. Don't be afraid of giving incomplete answers, as you're likely to learn something. In reply to What did I vote for?, for example, I gave a reply that was shown to be incomplete and was not the only one to learn something new. If you know it's incomplete, state what you know to be missing.

If you don't know whether a potential answer is right, then I would advise much greater reticence - at least, if you're trying to answer one of my questions! :-) If no other answers have been proposed, I would still go ahead in your place, but would put in lots of caveats so that you don't send anyone off uselessly shaving yaks.

Regards,

John Davies