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Uncertainty is a term used in subtly different ways in a wide number of fields, including physics, philosophy, statistics, economics, finance, insurance, psychology, sociology, engineering, and information science. It applies to predictions of future events, to physical measurements already made, or to the unknown.


If you aren’t in the moment, you are either looking forward to uncertainty, or back to pain and regret. ~ Jim Carrey

Hoyt's New Cyclopedia Of Practical Quotations[edit]

Quotes reported in Hoyt's New Cyclopedia Of Practical Quotations (1922), p. 826.
  • Quis scit, an adjiciant hodiernæ crastina summæ
    Tempora di superi?
    • Who knows whether the gods will add to-morrow to the present hour?
    • Horace, Carmina, IV. 7. 17.
  • Omnia sunt hominum tenui pendentia filo:
    Et subito casu, quæ valuere, ruunt.
    • All human things hang on a slender thread: the strongest fall with a sudden crash.
    • Ovid, Epistolæ Ex Ponto, IV. 3. 35.
  • Dum in dubio est animus, paulo momento huc illuc impellitur.
    • When the mind is in a state of uncertainty the smallest impulse directs it to either side.
    • Terence, Andria, I, 5, 32.

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