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Proof step 5 from proof levelsubset-tdnameex (previous step)

class∃(str, class) ∨ interface∃(str, class), ∀ class. interface∃(str, class) → interface∃(str0, class), ∀ class. class∃(str, class) → class∃(str0, class) ⊦ tdname∃(str0, class)

User applied rule case distinction

And obtained the following new goals

Proof step 3:
class∃(str, class), ∀ class. interface∃(str, class) → interface∃(str0, class), ∀ class. class∃(str, class) → class∃(str0, class) ⊦ tdname∃(str0, class)
Proof step 4:
interface∃(str, class), ∀ class. interface∃(str, class) → interface∃(str0, class), ∀ class. class∃(str, class) → class∃(str0, class) ⊦ tdname∃(str0, class)

Rule argument

[CASEDARG : pos: left 1, ()]

Additional information

[[CONCRETESIMPRULES : ()]]