Defence (Principle)

A semantics σ\sigma satisfies Defence iff every extension E∈σ(F)E \in \sigma(F) defends each of its members.

Reference

van der Torre, L. & Vesic, S. (2018). The Principle-Based Approach to Abstract Argumentation Semantics. In: Baroni, P., Gabbay, D., Giacomin, M. & van der Torre, L. (eds.), Handbook of Formal Argumentation, Vol. 1, Chapter 16, pp. 797–837. College Publications.