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Every state satisfies the following conditions:
- 
Every basic relation, with the exception of equality and Reserve, evaluates
to false if at least one of its arguments belongs to the reserve.
 - 
Every other basic function evaluates to undef if at least one of
its arguments belongs to the reserve.
 - 
No basic function outputs an element of the reserve.
 
It follows that every permutation of the reserve is an automorphism of the
state.