Ep 159 AstroTurfing and Truth

I talk about Astroturf in this episode, not artificial grass but the phenomenon of deceiving people through information manipulation. I have explained several times why information and the evaluation of information is subjective, so how does one navigate the sea of information much of which is potentially extremely subjective?
This is important to discuss in the context of Truth. Is there a Truth which we can all learn and through which we can ALL find common ground? Probably not... and I say that as a Jesus Phreak. So, what do we do?