 Switches also pose a problem for the view that causation is transitive—that is, the view that, if c causes d and d causes e, then c causes e. For, in the original version of the case, it seems that Filipa’s flipping the switch to the right caused the right bulb to turn on. And it appears that the right bulb turning on caused the room to be illuminated. But it does not appear that Filipa’s flipping the switch to the right caused the room to be illuminated. (For further discussion of switches and the transitivity of causation, see McDermott 1995; Hall 2000, 2007; Paul 2000; Hitchcock 2001a; Lewis 2000; Maslen 2004; Schaffer 2005; Halpern 2016b; Beckers &amp; Vennekens 2017; and McDonnell 2018.)