So why is time discrete? Why could you not get from t1 to t2 if time were not discrete? And what does that have to do with the possibility of an infinite regress?
I’m not trying to establish proof, I’m trying to get the necessity out of your arguments about why time must have a beginning. I just don’t see a problem with a retro-eternal universe.
We don’t know that that was the beginning. Even most scientists, when they’re being honest, will admit that we don’t know that. In fact, there’s been recent evidence (or maybe it was just accepted theory) that the BB wasn’t the beginning of the universe, that the universe goes through cycles of expansion and contraction, or that our universe exploded into existence from a parent universe.
Oh, well, since you added that third point, I guess time must have a beginning. I mean, if you stuck with only 2 points, your arguments would hold no weight whatsoever. But this third point, especially since it asserts the clarity of your paradox arguments despite my counter-arguments, settles the matter.
I get the point of your argument. I did offer a rebuttal if you care to read it. It was this: the need to traverse an eternity of time, or an infinite number of causes, is only a problem if you imagine starting from somewhere (somewhere eternally distant in the past). But the point of talking about a retro-eternal universe is to do away with any starting point. All points in the time, all events that occur therein, are just there–already in the past (relative to where you are now).
Understanding this depends on how you imagine time in the abstract. You can imagine time in a static context–such as when we plot time on a diagram–all points along the time axis “coexisting”. If this is the true state if time (and I would expect you to agree with something like this since you believe God exists in a timeless context) and our experience of time flowing by is just an illusion of subjectivity, then the problem of an eternal universe becomes the problem of an infinite (spatially) universe, which isn’t a problem at all as far as I’m concerned.
You can also imagine time in the subjective context–or dynamic context–the one in which time exists just as we experience it. But in this context, the past and future don’t exist. There is only now. Now is dynamic, ever changing, becoming the future and relegating its old states to the past. But in a context in which past and future don’t exist, what sense does it make to talk about an eternity of time OR a beginning. We’re left just talking about what kind of conceptual framework best models the past in our minds. And there’s nothing wrong with talking about a model featuring retro-eternal time. Nothing has to “traverse” all of time to get to now in a model. It’s just a picture.
They always come in 3s, don’t they?