It's an 'inarguable' [='indisputable, unquestionable'] fact.
(..) So, you know, isn't there some way you and Sheldon could compromise... ...on this presentation thing? No, no. Scientists do not compromise. Our minds are trained to synthesize facts and come to inarguable conclusions. Not to mention, Sheldon is bat-crap crazy. What is this? Oh, careful. (..)2008 TvShow: The Big Bang Theory Title: The Cooper-Hofstadter Polarization Season: 1 Episode 9