>>11847992Imagine two people seeing each other in 3D,
spaced 6 feet apart on the x-direction,
in line on the y-direction and standing on
the same z-direction.
Person A wants to leave Person B in a crazy
fashion so A adjusts a LED display on his hat
which displays a random real number. At the
moment, it matches B's number on his hat.
A adds pi to his number, and just like that, they
no longer see each other even though they
remain as described in 3D.
That is 4D space for you!
