 A different line of criticism has been advanced against interventionist accounts in several recent papers by Nancy Cartwright (e.g., 2001, 2002). According to Cartwright such accounts are “operationalist”. Classical operationalism is often criticized as singling out just one possible procedure for testing some claim of interest and contending that the claim only makes sense or only has a truth value when that procedure can actually be carried out. Similarly, Cartwright complains that the interventionist account “overlooks the possibility of devising other methods for measuring” causal relationships and also suggests that the account leads us to 