Gibbs: "So, we're setting out to find whatever this key unlocks?"
Sparrow: "No. If we don't have the key, we can't open whatever we don't have that it unlocks. So what purpose would be served in finding whatever need be unlocked, which we don't have, without first having found the key what unlocks it?"
Gibbs: "So, we're setting out to find this key?"
Sparrow: "Now you're not making any sense at all."
(it's a piano right? xD)
--
Gibbs: "So, we're setting out to find whatever this key unlocks?"
Sparrow: "No. If we don't have the key, we can't open whatever we don't have that it unlocks. So what purpose would be served in finding whatever need be unlocked, which we don't have, without first having found the key what unlocks it?"
Gibbs: "So, we're setting out to find this key?"
Sparrow: "Now you're not making any sense at all."