Is there a consesnsus as to whether the big bang represent an ultimate begining ? it seems to me that the answer to that question is no. The reason for this is that we need a quantum theoy of gravity to describe the moment of the big bang and all current attempts at this eg LQG, Hoyava gravity etc all imply that there was a pre big bangs scenario. Evven if these aproaches are wrong it doesnt change the fact that we cant be sure of what happened until we do have a cosnsitent theory of Qauntum gravity Furthermore inflation can be formulated to imply many big bangs eg eternal inflation. Whilst Guth, Vilenkin and Borde have proposed inflation cannot be eternal in the past. This has beeen disputed by Aguire and Graton so there seems to be no consesnus on this issue either. In short we cannot say the big bang represents an ultimate begining. We cant even be sure that there was an ultimte begning. The situation is still unresolved in cosmology. Anyone disagree?