The reflector ensures that's not possible. There are 26 independent circuits that go from the key switch through the pegboard through the rotors and to the ref

The reflector ensures that's not possible. There are 26 independent circuits that go from the key switch through the pegboard through the rotors and to the reflector. Pressing a key makes one of those 26 circuits hot. Now attach the reflector: it necessarily connects that hot circuit to a different one.