 An alternative account of the mesosome story has been offered by Hudson (1999). Hudson argues that considerations of robustness did not play a role in the scientists’ decisions concerning the reality of the mesosome. Had they, in fact, used such reasoning, they would never have believed in mesosomes. Instead, they used a kind of reasoning that Hudson refers to as “reliable process reasoning”. By this, he means basically that scientists trust experimental data to the extent in which they have reasons to believe that the processes that generated these data provide faithful representations of reality. In the case of the mesosome, the evidence from electron microscopes was first judged reliable. But later, it was shown empirically that mesosomes were actually produced by the preparation procedure. Briefly, it was shown by various experiments that the chemical fixants used directly damage biological membranes. The mesosomes were thus shown to be artifacts by empirical methods. Considerations of robustness thus played no role in the electron microscopists’ data reliability judgments.