
1) English-language idiom
Found on
https://www.crosswordclues.com/clue/duck-test

Duck test is a humorous term for a form of inductive reasoning. This is its usual expression: The test implies that a person can identify an unknown subject by observing that subject`s habitual characteristics. It is sometimes used to counter abstruse, or even valid, arguments that something is not what it appears to be. == History == Indiana poe....
Found on
http://en.wikipedia.org/wiki/Duck_test
No exact match found.