... chance I missing something or a reason this isn't a current theory but here it is so I'm kind of asking to be proved wrong bc this is really tripping me up. But here it is it's very hard to explain.
So if our universe is infinitely expanding and technically infinite the is a chance, though small, that there are other solar systems exactly like earth. Now this chance is small but bc the universe is infinite it will eventual happen. And it will happen an infinite number of times bc the universe is infinite. And this could break down to how life on earth forms. Life could form the exact same way even going down to the same people finding the same partners and having the same kids. And it can go even further to decision making. For example on this earth you go right down the road but on another one you go left. And this can happen with every decision you make. And again the chance is so small but it possible therefore everything will happen at least once bc the universe is infinite. Now the chance of these thing happening at the same time is unlikely. I hope this makes sense it was really hard to explain