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Introduce SProp trait for !~a == ~!a #491

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bvssvni opened this issue Oct 20, 2022 · 1 comment
Open

Introduce SProp trait for !~a == ~!a #491

bvssvni opened this issue Oct 20, 2022 · 1 comment
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@bvssvni
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bvssvni commented Oct 20, 2022

Is is known that !~a == ~!a does not hold in all models of PSQ, e.g. Dit Calculus.

One could introduce a SProp trait (for Sesh/Seshatism).
@bvssvni
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bvssvni commented Oct 23, 2022

The problem is that this design does not propagate:

!~~a == ~!~a is not provable from !~a == ~!a

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