Gravitons are speculative in that they haven't been observed, but they're almost certainly the correct language for describing mild quantum corrections to gener

Gravitons are speculative in that they haven't been observed, but they're almost certainly the correct language for describing mild quantum corrections to general relativity. Simple scaling arguments show that _any_ theory of quantum gravity that reduces to general relativity at low energies passes through a regime where it can be described by gravitons. Whether gravitons are fundamental objects in quantum gravity is irrelevant for the kind of state counting Baez is talking about.