Question

Why isn't inflation eternal into the past?

Answer 1

Does the Borde-Guth-Vilenkin theorem definitively demonstrate that the Universe cannot be past-eternal, whatsoever? Does it not assume a classical space-time while the real world requires Quantum mechanics?

Are there successful models in Cosmology that are Past-Eternal?

Why might Alan Guth say the Universe might be eternal in the past, when he himself wrote a theorem in 2003 saying it most definitely isn't?

Answer 2

$\large{\underline{\underline{\textsf{{\pink{Answer :- }}}}}}$

Does the Borde-Guth-Vilenkin theorem definitively demonstrate that the Universe cannot be past-eternal, whatsoever? Does it not assume a classical space-time while the real world requires Quantum mechanics?

Are there successful models in Cosmology that are Past-Eternal?

Why might Alan Guth say the Universe might be eternal in the past, when he himself wrote a theorem in 2003 saying it most definitely isn't?