The strong generic Arthur packet conjecture for GSpin groups

Let $F$ be a non-Archimedean local field, let $\psi$ be an Arthur parameter for a $GSpin$ group, let $\phi_{\psi}$ be its associated Langlands parameter, and let $\Pi(\phi_{\psi})$ be the corresponding $L$-packet. An $L$-packet is tempered when all of its members are tempered representations, and a representation is generic when it has a Whittaker model.

Strong generic Arthur packet conjecture. If $\Pi(\phi_{\psi})$ has a generic member, then $\Pi(\phi_{\psi})$ is a tempered $L$-packet; equivalently, all members of $\Pi(\phi_{\psi})$ are tempered.

This strengthens the weak conjecture, which only asserts that the associated Langlands parameter is tempered. The paper states that it establishes this strong version for $GSpin$ groups under the new local $L$-function assumption used in the work.