Story 24 Comment: A counterfactual explanation for the action effect in causal judgment (Dropbox) (Henne, Niemi, Pinillos, Brigard, Knobe, 2019). Experiment 2, joint causation. We are not testing joint causation because there is no asymmetry between two conditions. Vignette 1: Implosion. Tom works for a demolition company, and today he is demolishing a building by implosion. The building will implode automatically at 5:00 PM if both the safety switch is off and knob A is switched on. At 4:00 PM, the safety switch is off, and knob A is off. At that time, Tom checks to see if knob A is on, and he sees that it's off. So, he changes the position of knob A to the on position. Because the building would implode if both the safety switch is off and knob A is switched on, the building implodes at 5:00 PM. Did the building implode because Tom changed the position of knob A? Answer: Yes