 We use necessarily false conditions in disposition ascriptions outside talk about agents, too. Working with a model where the number of prey killed is a function of the number of predators, the model might say adding half a fox to a closed ecosystem, or adding \(1/\pi\) foxes to an ecosystem, produces a certain fraction of additional rabbits killed. But it is impossible to have, e.g., \(7+1/\pi\) foxes. Still, what the ecosystem is disposed to do on the condition \(7+1/\pi\) foxes are added and it is idealized in various ways is very different from what it is disposed to do with \(105+1/\pi\) foxes and the same idealization.