Sharpe, Alfred. Doubt. The Catholic Encyclopedia, Vol. 5 (New York: Robert Appleton). [2008-10-21]. (原始内容存档于2019-11-01). A state in which the mind is suspended between two contradictory propositions and unable to assent to either of them.
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Sharpe, Alfred. Doubt. The Catholic Encyclopedia, Vol. 5 (New York: Robert Appleton). [2008-10-21]. (原始内容存档于2019-11-01). A state in which the mind is suspended between two contradictory propositions and unable to assent to either of them.