Aristotle’s language here may be confusing, but it again boils down to what is probable
or necessary. Improbable and irrational things have happened before, which is to say it is paradoxically likely for improbable things to happen again. If it is the sort of thing that
could happen, it is fair game for imitation in a tragedy. In short, Aristotle implies that most of the objections made against poetry are moot, and that even events or actions that seem irrational or contradictory can be both necessary and probable.