I am 100% NOT a physicist so I couldn’t give you a proper sciencey answer.
However, if you mean, do I BELIEVE it, then yes I do. I think all the available evidence points to the occurrence of a big bang event, we can even now detect the leftover pulses of gravity that were predicted to have originated at the time of the big bang.
Of course, no one can know FOR SURE, but science does it’s best to give us an answer that is as certain as it can be. You could get all theological (religious), but that’s probably a question for someone else 😀
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Ali commented on :
So glad you didn’t ask me – I’d have to have gone and googled what you were talking about….. 🤣