Residual local indicability conjecture for admissible 3-manifold groups

Let $M$ be an admissible $3$-manifold with first Betti number $b_1(M)\geq 1$. Residual local indicability conjecture. The fundamental group $\pi_1(M)$ is residually locally indicable elementary amenable. This conjecture would provide the group-theoretic hypothesis needed to extend the Thurston-norm inequality beyond the cases currently covered by the theorem. The statement is presented as a proposed conjecture in the source, and no resolution is supplied there.