scepticism

/S K EH1 P T IH0 S IH0 Z AH0 M/
noun
  1. 1

    The practice or philosophy of being a skeptic.

  2. 2

    A studied attitude of questioning and doubt

  3. 3

    The doctrine that absolute knowledge is not possible

  4. 4

    A methodology that starts from a neutral standpoint and aims to acquire certainty though scientific or logical observation.

  5. 5

    Doubt or disbelief of religious doctrines

Source: https://en.wiktionary.org/wiki/scepticism, https://en.wiktionary.org/wiki/skepticism