Strong Admissibility

A set $E \subseteq A$ is strongly admissible iff every $a \in E$ is defended by some strongly admissible $E' \subseteq E \setminus \{a\}$.

Signature

A set $\mathbb{S}$ of sets of arguments is in $\mathsf{sig}(\mathsf{sad})$ iff $\mathbb{S}$ is decomposable (Dunne, 2020).