well, it’s something something I’ve thought about a lot. Like, what makes things salient? Why is “this” getting my attention and not “that”. But not just me; what makes something ‘important’ at all?
And so, it ‘sticks out’. Not even as just an expression; it does in some way differentiating itself.
How does a new physical dimension come from an existing dimension? Let’s say we’re in 2D? How do you get to 3D?
This is the stuff I try to look up or figure out sometimes.
So it seems it has to be at a 90 degree angle in a direction that doesn’t exist from the previous dimension in order to get into the next one – whatever is at a tangent, creating new space as it does so that did not exist before.
Or thinking about outlines; how is it that we know what objects are being represented when we draw outlines of them? What’s the minimum necessary amount of information for something to make itself known as it is in some minimal way? that kind of thing.