Wiktionary
a. Of a question or series of questions having as answers only "true" or "false" alt. Of a question or series of questions having as answers only "true" or "false"
Usage examples of "true or false".
The charts might be true or false, true as any man's skill could make them, or false as a man's need might draw them.
The physicians say that they foretell sickness, whereof terrible rumours have for some time past reached us from the East, though none know whether these be true or false.
But when the correspondent raised his eyes he saw the captain of the battery looking at him, his teeth still showing in a smile, as if his information, whether true or false, had been given to convince the foreigner that the Greeks were a very superior and brave people, notably one little officer of artillery.