There are several ways of talking about this. I kind of like cosmic bubbles (or Guth's pocket universes). Linde speaks of thermalized regions. The general idea seems to be that we inhabit a single inflating region within a much vaster (perhaps infinite) realm filled with (perhaps infinitely many) inflating regions and also (perhaps infinitely many) regions that aren't yet inflating. Each inflating region has its own set of fundamental physical constants, and, depending on the values of those constants, life-forms of one sort or another may or may not be possible therein.
It's a grand vision. But is it true? We don't know yet, and maybe we'll never know. In physics, there are no guarantees of access to evidence.
(perhaps infinite) realm filled with (perhaps infinitely many) Isn't infinite an abstract mathematical term? Is there anything in physics that is actually infinite? Other than theoretically. And by theoretically I mean such as mass at the speed of light - not existing in reality.
Infinite gives you sufficient "probability resources' to go anywhere you wish with any possible theoretic supposition.
But isn't this essentially a cosmic punt scientifically?
thanks very much for your reply...