Both situational irony and coincidence are used to refer to states of affairs that may be difficult to classify as clearly belonging to one concept or the other. And attempts to cleanly differentiate between them may be a fool’s errand. The most we can say is that some people care about the distinction a great deal, and it is worth asking oneself, before describing such occurrences, whether a juxtaposition is mundane (that is, coincidental) or more surprising, consequential, or significant — and therefore ironic.