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Proof step 4 from proof all-classes-01 (previous step)

∀ rk. rk ∈ rks ∧ is_fskey(rk .key) → # rk .key .fs .class .class < # str ⊦ ∃ class. ∀ r, ty, fieldvar. ¬ r -- mkfs(class, ty, fieldvar) ' ∈ rks

User applied rule exists right

And obtained the following new goals

Proof step 3:
∀ rk. rk ∈ rks ∧ is_fskey(rk .key) → # rk .key .fs .class .class < # str ⊦ ∀ r, ty, fieldvar. ¬ r -- mkfs(str .class, ty, fieldvar) ' ∈ rks

Rule argument

[EXRARG : pos: right 1, [extquanttermlist: (str .class) abort:F , discard:T , computed:F ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (str .class)]]