The t coordinate

[F2d5thCav]

Everyone is familiar with Cartesian systems.  Coordinates that are designated by an (X, Y) system.  Latitude and Longitude to indicate a place on the earth's surface is an example of this.

If one is interested in places other than surface level, a Z coordinate (elevation) is also needed.

But there is another coordinate that has long interested me -- I call it the t coordinate.  "t" for time.  All of us could occupy the same X, Y, and Z coordinates -- just not simultaneously.  But if each of us has a unique t coordinate . . . no problem.

Now, there is for sure no original thinking here.  Anyone who has contemplated time travel has thought about these things in one form or another.

I am interested in, though, not so much in time travel as time slips.

What happens if my place in time is just a bit different than yours ?

Can you see me ?

Can I see you ?

Could the direction of the arrow of time play a role in visibility ?  If that sounds 'out there', consider that the past is "real" -- it has occurred.  The future is unreal in the sense that it has yet to occur.  Now consider two observers, A and B.  They are close to each other in terms of X, Y, Z, and t coordinates, but not identical.  Because the past has occurred, could it be that observer A who is in the future in relation to observer B -can- see observer B . . . yet observer A remains invisible to observer B because he is in a timeframe that has yet to occur for observer B ?

And if that were true . . . for what duration would one be able to peer "back into" the past ?  Seconds ?  Microseconds ?

I wonder if micro slips on the time arrow like this happen . . . and allow the affected observer to see things and events not visible to others.

What does RN3 think ?

Thanks to @"Bally002" for prompting this line of thought.

Cheers