It’s possible for a trait to be strong evidence both for extreme rationality and for extreme irrationality. (Some traits are much more commonly held among the extremely reasonable and the extremely unreasonable than among ‘normals;’ seriously preparing for apocalyptic scenarios, for instance. Perhaps polyamory is one of these polarizing traits.)
Sometimes purely irrational behaviors are extremely strong evidence for an agent’s overall rationality.
Two more points:
It’s possible for a trait to be strong evidence both for extreme rationality and for extreme irrationality. (Some traits are much more commonly held among the extremely reasonable and the extremely unreasonable than among ‘normals;’ seriously preparing for apocalyptic scenarios, for instance. Perhaps polyamory is one of these polarizing traits.)
Sometimes purely irrational behaviors are extremely strong evidence for an agent’s overall rationality.