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Proof step 5 from proof junkref-primarray-level (previous step)

⊦ junkref(str, r, st) ↔ junkref(str1, r, st), has_classtype(st[r -- _type] .type)

User applied rule case distinction

And obtained the following new goals

Proof step 2:
junkref(str, r, st) ⊦ junkref(str1, r, st), has_classtype(st[r -- _type] .type)
Proof step 4:
junkref(str1, r, st) ⊦ junkref(str, r, st), has_classtype(st[r -- _type] .type)

Rule argument

[CASEDARG : pos: right 1, ()]

Additional information

[[CONCRETESIMPRULES : ()]]