什麼是真理? 尼爾斯．波爾在他與愛因斯坦的歷史爭論中有一段話，頗引人深思
『在哥本哈根的研究所，我們經常說些笑話來自娛，其中有的笑話是關於兩種真理的古諺。這個古諺說：世界上有兩種真理，繳一種真理是眾人皆知的常識，它簡單明瞭，以致於其"否命題"一眼便看知不能成立；另一種真理則為所謂「深刻的真理」，這種真理的"否命題"恰好也同樣是「深刻的真理」。』

In the institute in Copenagen, we used often to comfort ourselves with jokes, among them the old saying of the two kinds of truth. To the one kind belong statements to simple and clear that the opposite assertion obviously could not be defended. The other kind, te so-called "deep truths", are statements in which the opposite also contains "deep truth".
Niels Bohr, "Discussion with Einstein".

出處：P.228， 童年與解放/黃武雄著

參考：Longman E/E Dict.
truth - ture facts
the true facts about something, rather than what is untrue, imagined, or guessed

P.S. 晚間去聽了場演講，聯想到以前在書上看到的這個~ 故有此一貼。^^