What does "skepticism" mean?

Skepticism: (Metaph.) The doctrine that no fact or principle can be certainly known; the tenet that all knowledge is uncertain; Pyrrohonism; universal doubt; the position that no fact or truth, however worthy of confidence, can be established on philosophical grounds; critical investigation or inquiry, as opposed to the positive assumption or assertion of certain principles.

Additional senses

  1. 2.(Theol.) A doubting of the truth of revelation, or a denial of the divine origin of the Christian religion, or of the being, perfections, or truth of God. Let no . . . secret skepticism lead any one to doubt whether this blessed prospect will be realized. S. Miller.

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