cture. Conversely, non-ergodic MPMs are
those where there are multiple asymptotic stable states, which depend on
initial stage structure. MPMs that are reducible and/or non-ergodic are
usually biologically unreasonable, both in terms of their life cycle
description and their projected dynamics. They cause some calculations
in <code>Rage</code> (and elsewhere) to fail. Irreducibility is
necessary but not sufficient for ergodicity. These issues are flagged
with <code>check_irreducible</code> and <code>check_e