As global warming deniers move from "it's not happening" to "it's not human-caused" to "but it's good for you" to "it's too expensive to fix," I'm reminded of a tale from the Talmud. It seems a family was accused of returning a clay pot they had borrowed cracked beyond repair. The accused family had three defenses: They never borrowed the pot. The pot already had a crack in it when received. They returned the pot completely unharmed. Perhaps it is unfair to assume this story is about global-warming deniers just because it centers on a cracked pot.