 Proponents of the fine-tuning argument respond that our inability to observe something does not render observations to the contrary uninformative. For example, Leslie (1989) notes that someone put before an expert firing squad cannot observe that they do not survive, since they won’t be alive to make the observation. Yet in the unlikely event that they do survive, that’s strong evidence that the squad missed by design. Expert firing squads rarely miss by accident. Sober (2005) responds that a firing-squad survivor does indeed have evidence, but on a different basis, one that isn’t available to proponents of the design argument. See Monton (2006) and Sober (2009) for further discussion.