Adverb
In a demonstrable manner; incontrovertibly; clearly.
Source: Webster's dictionaryThe only thing that prisons demonstrably cure is heterosexuality. John D. MacDonald
Old beliefs die hard even when demonstrably false. E. O. Wilson
Did you know that true subjective time is measured in the minimum duration of demonstrably separate thoughts? Iain Banks
People are demonstrably insane when it comes to assessing human sentience. Jaron Lanier
But wow! This goofy child president we have on our hands now. He is demonstrably a fool and a failure, and this is only the summer of '03. By the summer of 2004, he might not even be living in the White House. Gone, gone, like the snows of yesteryear. Hunter S. Thompson
Emotions can certainly be misleading: they can fool you into believing stuff that is definitely, demonstrably untrue. Francis Spufford