Does teaching by cases mislead us about morality?

Those who teach or are taught medical ethics with a heavy reliance on case studies should be warned first of all that the practice tends to exaggerate the degree to which morality is controversial. Secondly, they ought to realise that it is often quite unclear what problems count as moral problems. Thirdly, they will need to bear in mind that there may be -- and presumably are -- limits to what we may regard as open to discussion. It would be quite superficial to assume that ethics teachers, going along with what is generally accepted by their colleagues in this matter, would never tempt students to disregard these limits.