∀ r, i, class1, st. is_arrayref(r, i, addclass(class1, fis0, st)) ↔ is_arrayref(r, i, st)
⊦
is_arrayref(r, i, addclass(class1, fis0, st)) ↔ is_arrayref(r, i, st)
User applied rule all left
And closed the goal!
Rule argument
[EXRARG : pos: left 1,
[extquanttermlist: (r, i, class1, st)
abort:F
, discard:F
, computed:T
]]
Additional information
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r, i, class1, st)]]