stoicathos said:
Your example of "two plus two equals four" is timeless. It's true for all times, unlike "dinosaurs and iphones exist". These tenseless verbs are often used as conclusions based on theories that are theoretically true for all times. If two plus two only equaled four in the past, then it would make no sense to say "two plus two equals four". Similarly, I can't make any sense out of "X exists, but not now".
I think you don't understand what I am saying about "tenseless" verbs. "Timeless" or "tenseless" means that no temporal coordinate applies. It does not mean that every temporal coordinate applies. If I say, "Two plus two equals four," and someone says, "When?", I don't say, "At every time"; I say, "Your question doesn't make any sense." I don't know what "2+2=4
at 4:00 Tuesday" means. "Equalling" is not an action that one performs at some time (not even at all times).
Do you really not know what "x exists but not now" means? Suppose someone says, "Solar flares occur, but there isn't one occurring this very instant." Can you make any sense of that?
The main point of this part of the discussion was this: Your thesis is in danger of triviality, which means it basically says nothing. If by "exists" you just mean "exists *now*", then your statement "only the present exists" is trivial. It means that only the present is present. That doesn't tell us anything, because it's tautological. Do you intend your statement to be tautological?
stoicathos said:
In what way are the child's "beliefs and fears" any more real than the "monster"? They're all mental fabrications.
I think you're confusing an idea or belief about X with X. Example: I don't think God exists, but I certainly know that *beliefs about* God exist. I mean, I don't think all the theists are insincere--I know they have the beliefs they say they have. The fact that they believe it, of course, doesn't mean it's true. The fact that beliefs about God exist does not mean that God exists.
So the monster is fictional, a "mental fabrication", unreal, non-existent, etc. The child's *belief* is not fictional, a fabrication, unreal, or non-existent--that would mean that the child doesn't really have the belief but someone is just pretending that the child has the belief. No, the child in your example is supposed to actually have this belief, so the belief exists.
The same point applies to your iPhone example. You are confusing a mental state with an object that it's about.
stoicathos said:
Your imaginary couch potato friend is one example of how a non-real entity does not affect reality, but it doesn't disprove all the ways that the non-real does affect reality.
The example was not supposed to be an inductive argument for the conclusion that the nonexistent doesn't affect reality. It was supposed to be an *illustration* to help clarify a self-evident principle by making it more concrete for you. Effects are not produced by 'things' that aren't there. There aren't any such "things" to begin with. Since the non-existent doesn't exist, there is no thing to talk about or attribute effects to. If you understand why my 'imaginary friend' isn't creating an indentation on the couch, then you should be able to see that in exactly the same way, no non-existent object is creating indentations, or exerting forces, or moving anything around, etc.
stoicathos said:
I assumed "A" to be a constant, because when you're dealing with units of measure or the constitutive regions of a whole (as in atoms) in reality, they are relatively constant. If you can find a particle that is always half as large as the neighboring particle, then your finite region of infinitely nonzero parts may have some basis in reality.
I'm not a believer in the ether. In theory, there are of course cubical
regions of space. However in reality, there is no substance small
enough, or as small as a volumeless point, to delineate a perfect cube.
Well, these were supposed to be regions of space, not particles. So I guess we're back to your thesis that unoccupied space doesn't exist. But then you face the problem that according to modern physics, almost all of space is unoccupied. Btw, in modern physics, elementary particles are represented as points (arbitrarily small positions are possible).
stoicathos said:
Maybe irrational numbers are not an indication of infinity at all, but a breakdown in the mathematical model of reality. Once you go out enough decimal places on any of the irrational numbers, you'll eventually get to a point where the difference in measure is smaller than a proton - do the numbers after that point mean anything at all in reality? I think you would agree that they don't have meaning under any circumstances, and yet after 30, 50, 1000 decimal places the numbers continue on meaninglessly with no connection to reality.
No, why would you think I would agree to that? I'm the guy who keeps saying that space is infinitely divisible, etc.
So far, I do not see any problem with the standard mathematical and physical understanding of reality, so I don't see any evidence for your hypothesis of a breakdown in the mathematical model of reality. Can you explain why you think that? Is it just because the standard mathematical representation implies the existence of actual infinities? If that's it, could you explain why you believe there could not be an actual infinity?