That is true for space dimensions, but there is also a time dimension, and would another dimension, that is 'orthogonal' to a time dimension not be some kind of dimension that offers alternative time lines?

Got'em

There is not a single thing we know about dimensions. I don't believe it

Orthogonality is relative in the human condition.

So we have six primary orthogonal directions (up/down, left/right, back/forth), and with seven colors we get the 42 permutations of entanglement that make up the human condition.

But no, seriously, you have cube with six orthogonal directions, yea? But if you cut a corner off, that's a fundamentally different orthogonal indicator as the other still-existing six, right? So that corner can be used as an indicator of a seventh orthogonal direction in three dimensional space. Thus, our neurons are calculating higher dimensional entanglements through a complex simulation of countless abelien sandpile models to detect aberrations in permuability that allow us to predict the future several seconds in advance, and so we are not IN a simulation, but rather each of us are our OWN simulation derived by the parameters of a topological matrix; that which causes the shadows on the cave wall.