But how to decide which data is viable and which is not? As technology advances fakes will become more and more sophisticated and lese and less easily to detect. Even today newspapers have no problem faking photos to show things they think to be true.

How else can we decide what is the truth? "What most people believe to be true is true?" We know that THAT does not work...

I know my view is pretty solipsistic - but since I live in a world where electronic media is becoming stronger by the second while at the same time I know how easily fakes are created (mind you, I'm no photoshop wizard, but even I can put up a decent fake that could boggle the common layman) I'm starting to doubt anything that I cannot see with my own eyes without intervention of electronic media.

Maybe I should stay with the old Illuminatus saying: "Nothing is true. Not even this sentence."