Surely either form of radical honesty falls at the first hurdle: how many people are even capable of forming an honest opinion, rather than parroting back something they or others opined earlier?

If I were being honest, I would say that the number of my truly self-made personal opinions is low, even counting the poorly reasoned ones - and I acknowledge this isn't one of them. So how can I be honest. Who is the me that could be honest?