A defining feature of relational frames that refers to the ability to combine mutually related events into a relational network under forms of contextual control that can include arbitrary contextual cues. Combinatorial entailment applies when in a given context A is related in a characteristic way to B, and A is related to C, and as a result a relation between B and C is now mutually entailed. The specific form of the network does not matter. It would be as correct to say that combinatorial entailment applies when in a given context A is related in a characteristic way to B, and B is related to C, and as a result a relation between A and C is now mutually entailed. Combinatorial entailment can be represented by the formula below.
