It is efficient as long as we understand it is not there.
I am no longer surprised by your acumen.
What's strange is that even though I know this, I'm still likely to rely on direction to navigate physically, because it's the only way I can think of to find a physical place using my senses. What does that mean?
And why do you think I'm insightful? Is it because everyone else keeps misinterpreting what you're saying? I thought they were just joking... I didn't think they could actually be misunderstanding it.
Space is an accomodation for the numbers.
A silence beween sounds.
Because if there were no space between the notes and sounds, it would sound like a painful cacophony with almost unintelligible sounds, and thus be noise instead of music?
Up and down. Right and left.
A point in direction?
Arrow is not what.
So, you're saying an arrow indicates what we perceive as direction because of its position/location relative to the thing it is intended by its creator to lead one to? On it's own, it would indicate nothing. Its meaning is in its position and location.