The Tunnel Problem is a variation on a problem in which you have two what?
Tunnel problem The Tunnel Problem is a philosophical thought experiment first introduced by Jason Millar. It is a variation on the classic Trolley Problem, a thought experiment introduced in the 1960s, and much discussed ever since. The tunnel problem is intended to draw one's attention to a specific issue in design/engineering ethics, and was first presented as follows:
Angle trisection Angle trisection is a classical problem of compass and straightedge constructions of ancient Greek mathematics. It concerns construction of an angle equal to one third of a given arbitrary angle, using only two tools: an unmarked straightedge, and a compass.