Absolutely Sure
Just a quick snippet today, as I’ve been composing stuff for use elsewhere:
“absolutely sure”: A rare example of the double-positive negative grammatical form in the wild. “Absolutely sure”, in technarch jargon, means “educated conjecture”, or indeed “wild-assed guess”.
See also: “reasonably sure”, qualified certainty, dubifier, Rationalist-Empiricist Pissing Contest.