JerryD thought to ask the I Ching, ‘What is a Universal Truth?’ (capital U, capital T)
Yi answered with Hexagram 13, unchanging: People in Harmony. Well, different people have different takes on this, but it sounds to me as though Yi’s saying that a ‘Universal Truth’ is just whatever people can agree on. (Actually on reflection I can think of less ironic perspectives, but I like this one.)
Anyway – here’s the thread.