No, it means that you should approach things with an open minded, questioning attitude, rather than thundering on about the gold standard or some such.

Maybe... Anyway, I take it as a given that in any such discussion, there will be some obnoxious people (the ones that dismiss arguments as "obviously stupid" without even thinking about them). I just ignore their attitude and try to extract ideas, information and inspiration. Personally I tend to start all sentences with "I think that...", "Maybe..." and so on, but I seem to remember PG writing somewhere that doing so is kind of lame ;-)