if it looks like a duck and walks like a duck, it is a duck

if it looks like a duck and walks like a duck, it is a duck

If something has all the characteristics of a thing, it is probably that thing, regardless of what it is called or presented as. There are many variations of the expression, and it is often shortened to the first part of the phrase. They say it's not a tax, but if it looks like a duck and walks like a duck, it is a duck.
See also: and, duck, if, like, look, walk
Farlex Dictionary of Idioms.
See also:
  • quack
  • tell me about it
  • have a thing
  • far be it for/from me to...
  • far be it from
  • far be it from (one) to (do something)
  • far be it from me
  • far be it from me to
  • far be it from me to do something, but...
  • far be it from one to