Points to agents that are the agreeing parties in an agreement. There must be at least two of these per agreement.
(=> (Agreeing-Agents ?Ag ?Agent)
(Exists (@Obligation) (Obligation-In ?Ag ?Agent ?Obligation)))
(=> (Obligation-In ?Ag ?Agent ?Obligation)
(Agreeing-Agents ?Ag ?Agent))
(=> (Agreeing-Agents $X $Y) (Agreement $X))
(=> (Agreeing-Agents $X $Y) (Agent $Y))
(Inherited-Facet-Value Minimum-Slot-Cardinality
Agreement
Agreeing-Agents
2)