 Reflection on switches can lead to the conclusion that token causation cannot be merely a matter of the intrinsic nature of the process leading from cause to effect. Consider the following variant: while the right bulb is functional, the left bulb is not. If the power had been turned on while the switch was set to the left, the left bulb would not have turned on, and the room would have remained dark. Given this setup, Filipa’s flipping the switch to the right does appear to be a cause of the room’s being illuminated. After all, with this setup, had Filipa not flipped the switch, the room would have remained dark. But, if we just look at the intrinsic features of the process leading from Filipa’s flipping the switch to the room’s illumination, there will be no difference. Or consider the following system of neurons: