FORALL_CONJ_RIGHT_RULE : (thm -> thm)
      A |- !z1 ... zr. t = ?y1 ... yp. !x1 ... xm. t1 /\ ... /\ tn
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    A |- !z1 ... zr.
          t = ?y1 ... yp. (!x1 ... xm. t1) /\ ... /\ (!x1 ... xm. tn)