 Consider the following claim: the truck drivers are engaged in a labor strike in virtue of picketing. What sort of claim is this? Well, it seems clear what sort of claim it isn’t. It isn’t an identity claim. For example, the property of striking isn’t identical to the property of picketing, as there are different ways of striking, such as carefully following all safety regulations so as to impede productivity. It isn’t a causal claim either, at least if by causation we mean what we normally mean when we use the term. The causes of the strike concern not the picketing of the truckers but, instead, antecedent events such as how their employer has allotted payroll deductions and benefits. Finally, the claim isn’t purely modal in character either—it isn’t merely the claim that there is a necessary connection between picketing and striking. Perhaps this behavior together with the satisfaction of other conditions suffices for there to be a labor strike, but the former suffices for any number of things, such as the fact that \(2+2=4\).