[pilgrimshost]

Well actually the 'known' truth or fact of something is always later changed, altered or differs from the original 'fact' or truth of something. Regardless of what it is. So a deffinition of the word is not actually satisfactory, as the understood meaning is constructed as a tool for use in itself, as meanings of words also change in time also. Ultimatly its the mind or the personal self that dissides the creates something to be true, then in the future, something else either takes its place or it has a new set of 'truths' linked to it.