<p>Murphy's letter opposing the call for mandatory training for rare anaesthetic events [<span>1</span>] challenges issues inferred, but not contained, in the editorial by Nathanson et al. [<span>2</span>]. For example, Nathanson et al. did not suggest that training would make individual humans less error prone. They proposed that we should be training staff to work in multidisciplinary teams, as teamwork can help us identify and correct the inevitable errors of our colleagues and can help them identify and correct ours. While the concepts of teamwork can, and should, be learned through lectures and reading existing literature, developing and refining the non-technical skills required for good teamwork requires training and deliberate practice, with targeted positive feedback. Simulation is the ideal learning environment for this, allowing non-technical skills to be observed, practised and improved. Murphy also seemed particularly concerned about the possibility of sanctions for failing to meet standards, but sanctions do not have a role in simulation training, and they were not mentioned by Nathanson et al.</p>