Sub-atomic particles don't seem to make sense in 3 dimensions of reality. But make sense in 2.

The quantum world doesn't seem to make sense in 3 dimensions of reality. But makes sense in 2.

Spacetime doesn't seem to make sense in 3 dimensions of reality. But makes sense in 2.

Sound seems more 2 dimensional than 3.

Light seems more 2 dimensional than 3.

If the things that make up physical reality are 2-dimensional and our brains interpret physical reality to be 3-dimensional, then it seems to make sense.

More exploration is needed, but I think this might lead to our key.

On a side note, I wonder why "crop circles" never seem to be 3 dimensional. Why always flat? If there is a message of some kind, could the message be that simple?