different between uncertainty vs dubiety

English

un- +? certainty.

uncertainty (countable and uncountable, plural uncertainties)

(uncountable) Doubt; the condition of being uncertain or without conviction.
(countable) Something uncertain or ambiguous.
(uncountable, mathematics) A parameter that measures the dispersion of a range of measured values.

dubiety (countable and uncountable, plural dubieties)

(uncountable) Doubtfulness.
(countable) A particular instance of doubt or uncertainty.
- 1843, Thomas Carlyle, Past and Present, book 2, ch. 2,
  And yet these grim old walls are not a dilettantism and dubiety; they are an earnest fact. It was a most real and serious purpose they were built for!

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