This time Mr. Raffles’ slow wink and slight protrusion of his tongue was worse than a nightmare, because it held the certitude that it was not a nightmare, but a waking misery.
Some have felt that these blundering lives are due to the inconvenient indefiniteness with which the Supreme Power has fashioned the natures of women: if there were one level of feminine incompetence as strict as the ability to count three and no more, the social lot of women might be treated with scientific certitude.
There are no more uses of "certitude" in the book.
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Her certitude has given way to doubt.
How many will trade the promise of capitalism for the certitude of socialism?