Tom,
"does adding 2 cups of water to 2 cups of popcorn give you 4 cups of soggy popcorn?"
And as Robert McEachern pointed out, most of the necessary information is in the observers head, not the algorithm, which is the minimal bits necessary to convey information from one observer to another.
As I pointed out previously, we are adding the sets, not the contents of the sets, thus 2 sets of 2=1 set of 4, otherwise we end up with apple sauce, or soggy popcorn.
"reminded that time alone is not physically real."
Yes, it needs action to exist.
"Space alone is not physically real."
It has no physical attributes to bound, bend, move or measure. The vacuum, not a point.
"I don't even know what that *means.*"
Are you able to understand temperature as an effect of action?
"Does the moon have no "tomorrows" and "yesterdays"?"
That's the point, the events arise from the actions. A moon 'day' is called a month, though it's actually about 28 of our days, but because we like to combine all these motions into one linear system, several days were added to each of the months in order for them to correspond to units of a year. Each action is its own clock, combining to physically create this changing configuration we refer to as the passage of time.
"Were you using a meter stick to measure something, would you call the zero end "coming into being", and the 1 meter end, "receding"?"
This is why space and time are not the same, even if measurements of them seem similar. A meter stick has no moving parts, so the relationship between what it measures is not in motion. A clock, on the other hand, generically consists of two devices and how they move or change in relation to one another. One measure is inherently static and the other is inherently dynamic.
"Then be content to be a majority of one."
Ok.
"That is to say, far from being an illusion, our sensation of that sumptuous moment now, ceaselessly streaming-in from nowhere and slipping away into the unchanging past, happens to reflect a truly objective feature of the world."
Regards,
John M