Philosophers, metaphysicians or social psychologists frequently employ thought experiments, such as the Trolley or Gettier cases, to study important epistemic notions or how people think about what is right or wrong, what is morally permissible or not. But these experiments suffer from significant limitations, argues philosopher of science Edouard Machery. In the Trolley case, for instance, people respond differently depending on the way in which the test is phrased and the order in which they read it. This is what psychologists refer to as “framing effects.” Moreover, demographic and cultural factors can have a significant effect on how people respond to these experiments. Edouard Machery asks us to recognise that intuition is not as reliable as we would like to think and to be more critical of the conclusions we draw from thought experiments.