  In this paper, applying the intersection theory of local Arthur packets, for
symplectic and split odd special orthogonal groups G_n, we give the first
complete proof of the enhanced Shahidi conjecture on generic representations in
local Arthur packets. We also classify unramified representations of Arthur
type for G_n, and show that they lie in exactly one local Arthur packet, which
is anti-generic. Then, we discuss the global applications of these results.
