Timeline for What would a proper answer of the form "no, what you're describing doesn't exist" look like?
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| Apr 8, 2013 at 18:11 | comment | added | Patrick87 Mod | Based on @Raphael's answer, I'd like to add one clarification to the above: my answer does not address questions which are answerable, but for which the answer may not be known (even by anybody). There's a difference between such questions and questions like "A duck is to a horse as a shoe is to what?"-type questions. The former may have "Nobody knows" as an acceptable answer; the latter are not good questions because it's hard to clearly distinguish correct from incorrect answers. | |
| Apr 8, 2013 at 18:07 | comment | added | Raphael Mod | I don't quite agree. A learner may very well ask "Are there problems between P and NP-complete?", which should have a definite answer. Reasonable answers can be given, pointing out the openness of the problem. I agree, though, that the cited question is more problematic, but asking for a "standard" result for "new" classes is not unreasonable either. | |
| Apr 8, 2013 at 18:05 | history | answered | Patrick87Mod | CC BY-SA 3.0 |