Recently had a dream where I was in a situation I have never been before in "real life" - (no real experience prior to the dream of this situation). After waking, all the feelings, thoughts, ...
I had a midterm question where this was relevant, essentially it was: "Assuming you're an atheist, how would you prove to Descartes that your last vacation wasn't a dream?" I put that since ...
The story went, a king dreamt he was a pauper every night, and a pauper dreamt he was a king every night. The philosopher asked whether there was a difference between the two.