1. Specific physical arrangements of matter- brains- result in consciousness formation.
Hopefully we can all agree here.
2. Any given consciousness is formed- and perceives through- not one exact arrangement of physical matter, but a range of different physical arrangements that share certain necessary physical characteristics (though the nature of these is not yet precisely understood), but differ in other ways physical.
This one's a little rougher. But I think you'll find that you agree.