controvertibility

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References in classic literature ?
Saxon smiled with appreciation, pointed out her foot, velvet-slippered with high Cuban heels, and slightly lifted the tight black skirt, exposing a trim ankle and delicate swell of calf, the white flesh gleaming through the thinnest and flimsiest of fifty-cent black silk stockings.
The controvertibility of "facts" and their tenuous relation to philosophical claims threatens to leave the moralist in a quandary.
Yet there was surprisingly little tendency, upon suspending gold controvertibility, to initiate reflationary action.