  Heuristic approaches in cosmology bypass more difficult calculations that
would more strictly agree with the standard Einstein equation. These give us
the well-known Friedmann-Lemaitre-Robertson-Walker (FLRW) models, and, more
recently, the feedback effect of the global topology of spatial sections on the
acceleration of test particles. Forcing the FLRW heuristic model on
observations leads to dark energy, which, pending fully relativistic
calculations, is best interpreted as an artefact. Could topological
acceleration also be an artefact of using a heuristic approach? A multiply
connected exact solution of the Einstein equation shows that topological
acceleration is present in at least one fully relativistic case---it is not an
artefact of Newtonian-like thinking.
