Talking in the 4D wheel thread I've had the thought that whereas things come in twos in our world things would maybe come in threes in a 4D world.
I'm starting to think that a 4Der won't think left-right plus ana-kata. I'm starting to think that they will think sideways direction a, b and c.
The reason being that they are all sideways to each other.
So I think we may need new terms altogether.