Is reincarnation real?
If we are here to learn lessons and fail and then come back to try again how can we possibly progress with no memory of past failures?

It's like thinking you've done well on a school exam only to have it returned to you marked with an "F" with no answers marked wrong. So you must try again without knowing what you missed.

I know the major wrongs are obvious, but what about the smaller things that seem like nothing, but really are something?

What if we've truly learned a lesson and know it while we're here and know we'd never make the same mistake again, but then we reincarnate with no memory of the situation or the lesson learned?
We're just doomed to repeat it.

This is why deja vu makes me really uncomfortable.
I don't like to think I'm living in some "Groundhog Day" cycle.