In what sense can we not help thinking that every event has a cause? One answer is, that this begs the question: we can think of events as uncaused. Well, we can think of events in isolation from causes, and we can formulate the proposition that some events have no cause, or that no event needs a cause. But the first of these does not constitute thinking of an event as not caused, but thinking of an event not-as-caused (or, not thinking of the event as caused); while the implications of the second, forming anti-causal propositions, are obscure. I can verbally formulate the proposition ‘some events are uncaused’; the question is, whether it makes sense to affirm it. Now I can verbally formulate the proposition ‘some triangles are quadrilateral’, and we must not say that this does not make sense; for I know the criteria for being a triangle, and I know the criteria for being quadrilateral; and the proposition simply asserts that there are some figures which satisfy both sets of criteria. That this is logically impossible is true, but it is not unintelligible. It does not, however, make sense to affirm a logical impossibility, simply because I cannot meaningfully affirm what I do not understand and believe to be possible (though of course I can meaningfully affirm what I believe to be false), and if I understand what it means to be both triangular and quadrilateral, I cannot also believe it to be possible, since to understand what it means for a plane figure to have three sides is to understand that this excludes its having any other number of sides, e.g. four. But ‘some events are not caused’ is not logically incoherent in this way, or not apparently so; for in thinking of an event (as opposed to thinking of an effect) I am by definition thinking of a happening (whether caused or not) in isolation from any cause; I am thinking of it not as caused. Thus ‘some events are uncaused’ is not incoherent ex vi terminorum.