However, without turning or moving your body, and simply looking sideways or up, and then proceeding to move in the direction you are looking, you are, in fact, moving 'ahead', and in this case, 'ahead' can be height, width, or depth.
It can be a bunch of things. But we weren't arguing about that at all.
But it most certainly cannot be depth. It shouldn't be this hard to understand. You cannot have depth if you have no object to move towards to. "10 metres ahead" doesn't give you this object. There COULD be an object, but again, that is not what we're arguing at all.
Ahead, as a term, only refers to moving forward from your current position and facing. And it is entirely relative.
According to yours and ChristineM's logic, dimension is an inherent part of space; therefore, there cannot be a condition of 'no dimension'.
True, but again, we were arguing the terms.
You literally said: "but the moment you say '10 metres ahead' you have already mentioned dimension, haven't you?"
As you see, i was merely responding to that. EVERYTHING else here is additional data not present in either mine or Christine's post. It's you making assumptions without data. You aren't arguing what we're saying. You're arguing what you WISH we were saying.
Pay attention: she said: '10 metres ahead'; 10 metres is one of the dimensions of height, width, or depth.
Yes, but your only condition was for her to say something without using certain terms. She fulfilled your condition.
"Show me where they exist, without first referring to constructs called 'height, width, and depth'."
Your own statement PROVES my statement to be true. She did not refer to any of those things. THAT is the entirety of my argument.
You're not paying attention. I said:
"if you did have some other point of reference, say the spaceship right next to you, and it's nose is pointing in the same direction as your head, then you might be able to say that '10 metres ahead' is the dimension of depth...", the target in this case would be the point at which one arrives at after a distance of 10 metres is traveled from where you begin Point A to where you stop Point B.
Oh i am paying attention. You are using circular reasoning.
Plus again, we weren't talking about which dimensions you were using while traveling, merely the terms used, as per your OWN CONDITIONS AND TERMS.
Anyway, for depth you must know your target beforehand. Dimensions are all relative. Depth is relative. You must have two objects to compare each other to, to even be able to talk about depth. This is required.
C'mon, now. Use your head:
Are you always this arrogant? It's very out of place considering the reality of the situation.
'10 metres ahead' already establishes the target, which is the point at which one ends the travel to 10 metres, Point B.
No, it doesn't establish the target. You actually moving 10 meters and stopping would establish your point B. But saying "10 metres ahead" definitely doesn't establish it in any logical way. Except assuming additional data when there is none.
'10 metres ahead' refers to the direction from which one is looking, or a bodily reference, such as one's chest.
Which one of those? Where one is looking or bodily reference? This should already show you how relative space and time really are.
It's a mental formulation of what constitutes 'ahead', but '10 metres' is a reference to the measuring device used to measure the distance from A to B.
No, that's mental gymnastics.
"10 metres ahead" refers ONLY to moving forward relative to your current position and facing. You getting additional data is you making assumptions. Again, it is not supporting your logic.
If you are referring to being right as regards her statement: 'space is those dimensions', then she is wrong, because, and even you just said it,
"Space / spacetime and dimensions are all concepts of physics"
That does not imply that she's wrong in the slightest. You are being way too optimistic.
IOW, they are models of reality, and not the actual reality, as she implies, when she says that 'space is those dimensions'. It's not. Space is dimensionless (you said so yourself), and as such, cannot be pinpointed or contained, just as consciousness cannot be pinpointed or contained. What makes it
seem to have dimensions inherently, is the superimposition of concepts such as 'space-time' over reality, which we then mistake for the actual reality.
I didn't say "space is dimensionless." You are just wishing i did.
My, my...you're still not paying attention.
I could refer you to my previous paragraph.
I said, and I refer to my immediate response to her statement that
'space is those dimensions':
"Show me where they [ie 'dimensions'] exist, without first referring to constructs called 'height, width, and depth'."
'10 metres' is a construct that can be height, width or depth. Show me where '10 metres' exists, either as height, width, or depth, within space as an inherent quality. Without the measuring device that determines '10 metres', there are no dimensions. IOW, it's all about the construct turned into a measuring device, and then superimposed over reality.
You asked her to show "where those dimensions exist without referring to height, width or depth."
Height, width and depth ARE dimensions. Time is another one. There could even be more. This is something you are not understanding.
Then you have the nerve to actually make another condition: Now she has to show you dimensions without using height, width, depth OR any measuring standards.
How exactly are people supposed to argue something so ridiculous? You ruined your own argument by imposing such stupid conditions.
It does not matter in terms of the claim that 'space is those dimensions', which is just another way of saying that height, width, and depth are an inherent part of space. They aren't. They're just concepts.
Space itself is a concept. It's not something inherent. It's an idea that attempts to describe reality.
So yes, they are concepts.
Somehow your idea of space is not a concept at all. How exactly are you going to explain this?
OMG! She used '10 metres' as an example of a dimension, whether it be height, width, or depth is unimportant. I don't care what value she is giving it; all I am saying is that '10 metres', or '10 kilometers' do not exist as inherent dimensions of space.
What exists as "inherent dimensions of space" then? How do you even know space or dimensions exist inherently? I say they are both concepts to begin with. Not inherent reality. Because they are relative, and observer dependent. Entirely.
Considering nothing exists inherently. Everything is subject to causality and preceding phenomena and events.
That it is a poor way to navigate is not the point.
To actually measure how far one has traveled after the fact, which turns out to be 10 metres, or whether one makes a guess that one is about to travel '10 metres ahead', both refer to the MEASURING DEVICE one uses to determine those values. The mental guess without the actual measuring device is an approximation based upon one's memory of the device and how it is applied to what is in space, in this case, from A to B, or even a mental idea of what 10 metres constitutes.
This again sounds awful lot like mental gymnastics and assumption.
I say they don't refer to the measuring device.
Yes,because you are making a mistake in logic, which is to mistake the description of reality for reality itself.
I actually think you are making that mistake. For one; you still seem to think that dimensions and space are something more than descriptions of reality. The thing is: I don't. I believe both space and dimensions are MERELY descriptions of reality. Not reality itself.
I only make the claim: Neither you or i are in the position to actually make the call on what is reality itself. Because our experiences are subjective. Our understanding of it is not identical. ALL this could just be my imagination too.