And I can demonstrate the foundation of my belief, and you can't disprove it, nor prove yours. Well ... I doubt then nor today would your average Trinitarian give you that definition, there were various ways of expressing the belief, but they were trinitarian. It's the role of theology to 'unpack' Revelation, as it were. (BTW, that wiki bit is not quite accurate, the Three differ in 'action' (or operation) and relation. Again, I can demonstrate the foundation of my belief ... OK, but that's not what we believe, so that's a classic straw man fallacy.