demonstrably

comparative more demonstrably · superlative most demonstrably · alternative demonstratably

1. In such a manner that is capable of being demonstrated, shown, or proved (without doubt).

   The country has become demonstrably less safe under his leadership.

   2 more examples

   Hence it followeth demonstrably, if our refusall to receiue Maister Blackwell to our Arch-priest, did, or could any way possibly make vs schismaticks, that the only and principall cause of such our refusall, was, and of all necessitie must needes haue bin, for that the Pope (note our words) or the Cardinall by his commission, had (instituting the subordination) appointed him for our Superior […]

   1602, A just defence of the slandered priestes wherein the reasons of their bearing off […] , London: R. Field, page 290

   Which (besides, that it would justifie the Socinian, in telling the World, That they have been a long Time troubled with a needless sort of Men called Preachers or Ministers) is most demonstrably false, there being some Thousands in the World, that can Discourse well in Company, and many Lawyers that can Plead very well at a Bar;

   1700, An answer to Dr. Scot's cases against dissenters concerning forms of prayer and the fallacy of the story of Commin, plainly discovered., London: A. Baldwin, page 37