I don't agree that they're absurd. They have widespread popularity because they capture the kind of cost dilemmas that crop up all the time, eg 'if we build thi

I don't agree that they're absurd. They have widespread popularity because they capture the kind of cost dilemmas that crop up all the time, eg 'if we build this refinery we can predict that an additional 20 people will get cancer over the next decade, but otoh we might achieve a 2% reduction in the cost of gasoline for everyone in our state over the same period.' The main intellectual error of utilitarianism is the assumption of perfect foreknowledge, and the justification of conclusions as if those predictions were facts. But just because trolley problems are stark oversimplifications does not make them useless as ethical reasoning tools; studying them helps you recognize messy ethical dilemmas as such rather than being seduced by the alleged upsides of a policy proposal.