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Is there a standard adjective or term which classifies "questions with a known, single, unambiguous, objective, and correct answer"?

That is, questions like "2+2=?" or "What is the capital of Ohio?", as opposed to questions like "Who's the best band of all time?" or "What is human nature?".

If you wanted to describe the kinds of questions StackExchange welcomes and encourages in as few words as possible (ideally two: adjective + "questions"), what would you say?

PLEASE: No philosophical debates about whether "objectivity" is possible or a meaningful concept, or the infinite possible interpretations of "2+2"; for the sake of answering this question, assume objectivity and correctness are meaningful and achievable goals.

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Unclosable. :) –  tchrist Sep 2 at 2:16
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What's wrong with objective (which you use in your question)? –  Jim Sep 2 at 2:20
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Straightforward, perhaps? That probably would include a question like "Who's the best band?" though. –  guifa Sep 2 at 2:21
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@Jim, it doesn't imply "known". A question can be "objective", but still open to debate ("can general relatively and quantum mechanics be reconciled"?) –  Dan Bron Sep 2 at 2:22
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Ah. Good point. –  Jim Sep 2 at 2:25

8 Answers 8

up vote 26 down vote accepted

It is called a factual question. Because the answer is a fact rather than a subjective opinion.

factual

Concerned with what is actually the case rather than interpretations of or reactions to it: a mixture of comment and factual information

[oxforddictionaries]

An explanation of factual question from the book "Spoken Language Understanding: Systems for Extracting Semantic Information from Speech" By Gokhan Tur, Renato De Mori:

The simplest and most frequent question type is a factual question. These questions are questions for which the answer can be a single word or a multi-word expression, often is a named entity. An example question is: Who is the French president?

Another explanation of factual question from the book "Principles of Research Design in the Social Sciences" By Frank Bechhofer, Lindsay Paterson:

When discussing the design of individual questions, it is quite useful to have a basic distinction in our mind between factual questions and opinion questions. An example of a factual question is:

How much wine did you consume last week?

By 'factual' is meant not whether the answer is factual - is true - but rather whether there is in principle a true answer. So the example does have a single true answer, however intrinsically difficult it might to find out what that is.

Lastly, the below excerpt explains the difference between factual and nonfactual question (from the book "Applied Survey Methods: A Statistical Perspective" By Jelke Bethlehem):

Kalton and Schuman (1982) distinguish factual and nonfactual questions.

Factual questions are asked to obtain information about facts or behavior. There is always an individual true value.

The fact to be measured by a factual question must be precisely defined. It has been shown that even a small difference in the question text may lead to a substantially different answer.

Nonfactual questions ask about attitudes or opinions. With opinion and attitudes, there is no such thing as a true value.


There is also a question type called answered question which is considered to have a definite answer. [It is mentioned under philosophic questioning on http://www.uri.edu/personal/szunjic/philos/whystudy.htm]

"Those questions that are already capable of definite answers are placed in the sciences, while those only to which, at present, no definite answers can be given, remain to form the residue which is called philosophy." Thus philosophic questions can turn into scientific truths as soon as they are answered. In other words, many scientifically established truths have started as philosophic questions, but once they received definite answers they get moved to the realm of science.

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This may be the best you can do with a single word: "factual." The only thing it doesn't necessarily cover from the original question is that the answer is known; it is possible to ask a factual question whose answer nobody yet has found out. –  David K Sep 2 at 4:07
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We don't have to look only to the social sciences; the hard sciences (physics, chemistry, biology) and especially mathematics have plenty of factual questions, and the really interesting thing is that even in mathematics we don't know all the answers yet. I still stand by your answer to this question (of opinion) as the best. –  David K Sep 2 at 4:22
    
Short, clear, universally understood word, and well-argued, well-researched and supported answer. +1. I'm going to wait a while to see if anyone comes up with an answer which additionally covers "known" or "matter of record"; if that doesn't happen today, you'll get a ✓ as well. –  Dan Bron Sep 2 at 10:39
    
@DanBron: Factual questions generally have known answers. There might be some exceptions because it might be hard to measure the value to give an answer and this is usually a scientific fact :) –  ermanen Sep 2 at 14:15
    
I'm not convinced. Goldbach's conjecture poses a factual question (it's literally either "yes", every even integer greater than 2 can be expressed as the sum of two primes, or "no", it cannot, and here's a counterexample), but it remains unresolved. Similarly, courts concern themselves with factual questions (did Dan steal the crown jewels, or not?), but those questions are open while being argued, and in many cases remain unresolved. Last night it came to me that we might call such questions "settled", but I was waiting to see if anyone else suggested that or synonyms other than me. –  Dan Bron Sep 2 at 14:25

There is a concept in mathematics similar to this, where a question can be described as well-posed.

Loosely speaking, a question is well-posed if (1) a solution to it exists and (2) is unique. In its original use by Hadamard there was a third technical caveat, but the term now gets used widely in the above sense.

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I would call it a resolvable question.

resolve

  • Settle or find a solution to (a problem or contentious matter). Source: Oxford Dictionary

  • To find an answer or solution to (something) : to settle or solve (something). Source: Merriam-Webster

Edit: I changed my answer from resolved question to resolvable question because I think it better describes a question that might not have been answered yet in the current context, e.g. on StackExchange, despite the fact that it does have a known answer.

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I suggest 'definitively answerable'.

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Yeah, a lot of the ideas / suggestions I've had describe the answers (e.g. "uncontestable", "not open to debate"), but I was hoping for a word or term which describes the questions which elicit / require such answers. –  Dan Bron Sep 2 at 2:41
    
@DanBron: It might well be that the best way to describe a question is to describe its possible correct answers. An answer is "not open to debate" only if it answers a question that doesn't have any other reasonable answers. –  John Y Sep 2 at 2:59
    
Sure, it might well be so; that's what this question is specifically seeking to determine. That is to say, if the answer to this question is "foo", the question itself is "foo". If there is no single, objective, correct answer to this question ... well, then, it isn't. –  Dan Bron Sep 2 at 3:03

While I have seen unequivocal as a descriptor of answers, I suppose the OP is looking for unequivocal questions. The questions would be strong, clear, unquestionable, and leaving no doubt. (Curious thought, that: an unquestionable question.)

If it would survive Stackoverflow, the question would have to be

(However, judging from this forum and its siblings, it seems that the questions that garner the highest attention and rank do have some ambiguity, are subjective, and attract competing answers, of which several may be correct. Look for the soft-question tag or questions that have been closed despite many votes.)

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If this term is for describing SE/ELU questions, there may need to be a nontrivial condition for questions closed as General Reference. (Relevance may be an issue too.)

If so I like substantive. Oxford Dictionary defines it thus:

Having a firm basis in reality and therefore important, meaningful, or considerable

A lot of the definitions I see in Merriam-Webster are qualities that good questions have:

important, real, or meaningful

supported by facts or logic

having substance : involving matters of major or practical importance to all concerned

For maximum effectiveness, substantive may need to be used in a different way than adjective + "questions". One I've thought about is "questions that solicit substantive answers." Perhaps then uniqueness could be captured through:

belonging to the substance of a thing : ESSENTIAL

Substantive question(s), according to Google nGrams, is a recognized expression but used less than factual question(s).

Two other substant- words I considered were substantial or substantiable.

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A phrase I've heard when the answer is known and unchangeable is "given" (sometimes preceded by "a"; i.e., "It's a given that 2+2=4", or "It's given that the capital of France is Paris".

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The capital of Paris is France ? –  Neeku Sep 2 at 13:31
    
Geography error fixed... –  Brian Sep 2 at 16:07
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You wouldn't use "given" to characterize the question, would you? Can you say "What is the capital of France?" is a "given question"? –  Dan Bron Sep 2 at 16:30

Questions which have "a definite, known answer?"

"Definite" is rather explicit, being "clearly defined or determined." "Known" implies not only solved, but the tone is such as leans away from "esoteric."

"Definite and known," is nailed down on a post, a post that anyone can go and look at, considering today's easy access to information. It is not nebulous or debatable, as the meaning and weight of words like "consensus" are.

Rather than saying "superfluous," which depends on one's point of view and ken, I will say that we can call such questions "common knowledge."

Yes, I know- we are looking for what to call the questions... but if you ask me if the sun is hot or cold, let us be friendly, and agree that the information you seek is common knowledge.

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