I was interested in your post because I heard Prager's scenario and was motivated enough to email him my critique. (I don't agree with you about Prager's intellectual ability. I find him very illogical). And was trying to remember what it was that I said to him.

Don't remember exactly, but I remember that I offered the opinion that his scenario was actually about knowledge, not about where the men were coming from. We have a lack of knowledge in that situation. If we're creating a scenario about increased knowledge we might as well include knowledge about whether these are nice people regardless of where they are coming from.

Prager's example was actually of something different than he thought it was.