Learn English – A word to describe Yes, No and unknown

single-word-requestsyes-no

I am facing a problem during programming.
I am trying to describe a collection of three words.
Is there a word for yes, no and unknown ?

The words for example could describe if someone is authorized to do something, so I could call the collection Authorization. I could describe if someone is certain, so I could call it certainty. My question is, is there a "meta" word for that ?

You could for example say light blue, royal blue, airforce blue and sky blue are words to describe blue but the "meta" word for that would be colour.

The context in which I am trying to use that word is, as stated above, a programming scenario

public enum MISSINGWORD
{
    unknown = 0,
    Yes = 1,
    No = 2,
}

I don't have a real live example, where you would need that word other then describing the abstract collection of those three words without any adjective tied to it.

Best Answer

These are Ternary values (AKA trivalent values). A variable holding such value is sometimes called a Trilean.

Instead of using Bivalent variables and some Bivalent logical system (Boolean logic is the most common), you are using Trivalent variables. Several ternary logical systems (e.g. Kleene, Priest and Łukasiewicz) are defined with Trivalent variables .

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