"Fuck should I know, man," he mutters. Ed's nervous energy fills the cell, making Jack's teeth itch. He got so used to the weight of his despair, almost comforting. Ed's need for action, for explanations, grates on him. There isn't an explanation, not really. Hornigold is Hornigold. Same evil bastard he was 20 years ago. Even if the man laid out his reasoning, plain as day, Jack wouldn't believe him. Not really.
And as for a plan...