The scene is a four engine jet liner. The pilot’s voice comes on the intercom: "Those of you on the left side of the plane have probably noticed that one of our engines has failed. Please do not be alarmed. We can still fly on three engines, but we will probably arrive about 15 minutes late." A few minutes later, the pilot’s calm voice came on again: "Those of you on the right side of the plane are probably aware that a second engine has failed. Please do not be alarmed. We can make it on two engines, though we will probably be at least 30 minutes late now." A few minutes later the pilot spoke to the passengers again: "It has just come to my attention that a third engine has failed. Please do not be
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