What is unbearable?

“A FATE worse than death” is a journalistic cliché, used this week alone to describe a visit to the dentist (in a British newspaper) and the plot arc of a character in J.K. Rowling’s new “Harry Potter” play (in an American magazine). But for the terminally ill, such fates do exist: death really can seem preferable to a lifetime of pain and suffering. A growing movement, including this newspaper, thus seeks to legalise—with stringent safeguards—doctor-assisted suicide around the world.