Can it even be taught?

I think anyone can learn...but the discovery of truth can be extremely scary and painful...and I don't think most people want to face REAL reality even if its more truthful and data based.

An easy narrative is much happier and easier to digest do people will choose that over truth.

I think religius narratives came about specifically to deal with the reality of pain, the unknown, and death.

Up to a degree, definitely. It seems thought that for certain people it somehow comes naturally. (But perhaps it was taught to them unbeknownst to themselves)

People can at least be told about the concept. Mentioning the socratic method yields nothing but blank stares to high schoolers.