What prevents scientists from being able model what was before the Big Bang?

Question

What prevents scientists from being able model what was before the Big Bang?

In: 822

Answer 1

Nothing. We can create models from various different perspectives. QM would posit a thermal equilibrium that had arbitrary perturbations – one of which ended up in this conversation. Rodger Penrose posits that energy tunnels back in time & creates a big bang.

There are plenty of models about what could have been before the Big Bang. However nothing to actually experiment against, nor any real apparent valuable reason to prove a given model. What would the scientists who proved this earn their Nobel prize in?