Affirming the consequent

From sciforums_encyclopedia
Jump to: navigation, search

Affirming the consequent is a logical fallacy, which covers all arguments of the form:

  1. If A, then B.
  2. B is true.
  3. Therefore A must be true.


  1. If something is an elephant, it must have a tail.
  2. All mice have tails.
  3. Therefore, all mice are elephants.