Adriana asked:

According to kant what would it mean that a person could not move in empty space?

Answer by Jürgen Lawrenz

As far as I’m aware Kant never mentions empty space. He says that space is a necessary intuition for us, so that we can understand our own motions in relation to all other motions. You could legitimately infer from this that space does not exist in itself. Which is very different from ’empty space.’

I don’t think the idea of empty space is intelligible. What sort of a space could be empty? Do you know or understand what empty space is?

Be that as it may, once you have a person, there is no empty space.

Once you have a person, there must be more than one person, and they must be co-ordinated in space.

So your question is self-contradictory. A bit like ‘can a mouth eat itself’?