والثاني ما يؤلف من المسلمات بين المتخاصمين.
The second type is composed of propositions conceded between the disputing parties.
The defining mark of a conceded premise is its admission by the particular interlocutor. If the interlocutor admits a rule, one can show what follows from it.
This does not make admission conclusive proof of truth; it establishes what the other party is committed to, provided the reasoning is valid.