" Doug Swieteck,' Mr. Ferris said, 'do you know the basic principle of physical science?'

A trick?

'No,' I said, sort of slow.

'The basic principle of physical science is this: no two bodies can occupy the same space at the same time. Do you understand that?'

'I think so,' I said.

'Do you understand what the principle means?'

I shook my head.

'It means, Doug Swieteck, that in this class, you are not your brother. "

― Gary D. Schmidt , Okay for Now