unreason

/AH0 N R IY1 Z AH0 N/
noun
  1. 1

    Lack of reason or rationality; unreasonableness; irrationality.

  2. 2

    Nonsense; folly; absurdity.

verb
  1. 1

    To prove to be unreasonable; disprove by argument.

  2. 2

    To apply false logic or think without logic.

  3. 3

    To make unreasonable; to deprive of reason.

Source: https://en.wiktionary.org/wiki/unreason