Κρυστάλλινη Σφαίρα

- Daddy? Suppose that great boulder fell down from where
  it's wedged between those other rocks. Wouldn't it
  block our way out, and we'd never, ever, ever get
  home again?
- It would, but it won't ... That boulder's probably been
  there for many thousands of years. It's not going to
  come down just when we're here.
- Surely, if it's going to fall down sometime, then the
  longer it's been there, the more likely it's going to
  fall down now?
- No, it's not like that at all ... Actually, you could
  even say that the longer that it's been there, the less
  likely that it's going to fall down when we're here.

-- Roger Penrose, "Shadows Of The Mind"

Σηκώνει πολλή συζήτηση, αλλά προς το παρόν με απασχολεί πώς θα με βοηθήσει να κερδίσω στο στοίχημα.