But applying that to ourselves is precisely what we don't do. As long as we are both moving in the straight lines, it is perfectly correct for each to say the other is experiencing slowing of time.
Again, that's what the twin believed too, but we have already shown his viewpoint was in error.
Both viewpoints were actually always correct. They merely reunite and find one aged more than the other, that's all.
Which would not be true if the stationary frame's clocks had actually been the one that slowed. The stationary frame is stationary. It's clocks never change at all, not once. That was the entire point of Einsteins thought experiment. To show it was changes in velocity which caused clocks to slow. In fact your below statement shows you understand that the stationary twins clocks do not slow, since he experiences the greatest aging. Only the twin in motion experiences slowing of clocks.
Now this is seriously astray. If our world experiences billions of years of radioactive decay, you can't have the same world also experiencing only a few thousand years. Its as if you asserted the stay at home twin . . . that didn't go galavanting around at near light speeds . . . both aged and didn't age. Our earth is definately the stay at home twin. Distant galaxies are galavanting away from us, and are NOT going to turn around and come back, so the situation very very different. Remember, the stay at home twin (analogous to us) experienced the greatest aging.
I sure can. The twin before he started his journey aged at the same rate as the stay at home twin. As his velocity increased, that same twin now experienced a slower aging (slower decay rate) than he had in the past. His decay rate is now no longer the same as what it used to be. It is now slower. Evidenced by the fact when he returns he is younger than the twin that did not experience changes in velocity.
Our earth is not the stay at home twin. Our earth is traveling at fractions of c through space. The stay at home twin is the earth thousands of years ago when it was traveling through space at a much lesser velocity. And hence it indeed would have experienced the greatest aging.
We are continuing to accelerate - the entire universe is. Therefore the closer you get to stationary - the further back in time you go - the greater is the decay rate.
You cant avoid it, it is proven science that as one thing increases in velocity, it's time rate slows as well as it's decay rates. We are now traveling through space faster than we were. Tomorrow we will be traveling faster still and our decay rate will be fractions less than it is today.
But you will call tomorrow ticks of time that are longer in duration seconds, regardless if they are the same length or not. Hence you think time has always remained the same, because you call different lengths of time seconds, even knowing they are not the same duration.
The traveling twin calls his ticks seconds, even if they are longer in duration that the stationary twin's ticks. When he returns, the two clocks no longer agree on how much time has passed, because each twin called a different duration tick of time a second. What you define as a second today will not be of the same duration as what you will define as a second tomorrow.
We've been having PERFECT weather! Not to hot, but a little bit breezy.
Man it's been HOT and humid here. In Ohio today, will be in Florida in a couple days and then who knows where the next....