 Loop: “In the well-known trolley-problem case it seems permissible to switch a runaway trolley onto a sidetrack on which it will hit only one person rather than allow it to continue straight ahead and hit five. But it also seems permissible to switch the trolley in [Thomson’s] Loop case … in which the sidetrack loops around and rejoins the main line, so that if the trolley does not hit the one person and thereby come to a stop, it will continue around the loop and hit the five.” (Scanlon 2008, p. 18.)