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1). There cannot be an infinite regress of events because then time would be infinite.
2). If time is infinite, we'll never exist because at any point infinitely past, we will still have an infinity to go before we exist.
3). Thus, the universe has a beginning.

Can we at least start here? Can you agree on these things?



Principially it is a good idea to find a basic point of agreement from which you can start a discussion. You only should then better choose statements that are not so obviously illogical.

According to your thinking, the number "0" can never exist because you had to go over infinite many negative numbers before reaching "0". I would agree that our current universe had a beginning. However thinking that this is the only universe and there is nothing else before or afterwards is not logical, but religious.