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Proof step 2 from proof eqd-symm-lem (conclusion)

⊦ eqd(sys, d, sys0) → (¬ eqd(sys0, d, sys) ↔ false)

User applied rule insert lemma

And obtained the following new goals

Proof step 1:
⊦ eqd(sys, d, sys0) → eqd(sys0, d, sys)

Rule argument

[LEMMAARG : eqd-symm, [sys, sys0, d] → [sys, sys0, d]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (sys, sys0, d)]]