In such a manner as to be capable of being demonstrated, shown or proved.(adverb)
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Use "demonstrably" in a sentence
"Unquestionably and demonstrably from the Latin word _dies_, in which, however, visibly there is not one letter the same as any one of the seven that are in journal."
"The term demonstrably greater means - sufficiently large so that it can be demonstrated quantified measured and proved."
"His conclusion in demonstrably wrong, the idea that the book would just lead to cynicism."