True might
"Heath Ledger Might Be Dead, but the Heath Ledger Scandal Dept. Is Still Taking Calls."
The gossip-sheet author who wrote that headline wasn't trying to cast doubt on the actor's demise. He was just using a common rhetorical device: granting a point with might or may, before stating the counterpoint in the next clause.
It seems to me that might was added to that first clause not because of any question about whether the clause is true, but rather as a way of signaling doubt about its logical connection to the point made in the second clause. In fact, you could eliminate the modal without really changing the force of the argument: "Heath Ledger is dead, but …"
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