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Old 12th Apr 2018, 11:48
  #2147 (permalink)  
roving
 
Join Date: Sep 2009
Location: over the rainbow
Age: 70
Posts: 562
This seems to fit the bill.

The duck test is a form of abductive reasoning. This is its usual expression:

If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck.

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.
roving is offline