Well, what if it is too hard?

Imagine that you knew for a fact, that for any person in a community whose beliefs you were poised to challenge, it would feel too dangerous, too boring, too uncomfortable or awkward to actually go outside and closely observe the territory which they have every reason (with the sole exception of your assurance) to model as utterly uninteresting. And yet imagine (it's a bit of a stretch, I know, but please play along for the sake of this exercise) that you care for them enough to try and help them discover truth, or maybe use them to improve your map by observing their struggle. How would you go about making them face the contradiction?