 Indeed, given that observability is itself supposed to be a subject of scientific theory (as noted above), acceptance is the natural attitude for a constructive empiricist to take toward the counterfactuals that explicate observability. She relies on those counterfactuals in the way she relies on the other elements of the theories she accepts, even (in certain contexts) talking as if the counterfactuals are true. In this way, according to Dicken, she can make use of claims about what is observable while at the same time being agnostic about possible worlds whose existence is purportedly entailed by the truth of the counterfactuals explicating observability.