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IMO I don't see JTh as a raising hand in this situation. If everyone had just called around to you then you might raise, but I don't consider it a reraising hand. There are 12 overcards in deck against you!

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You're not reraising JTh here because you think you have the best hand at the moment (though you might). You're reraising because you have at least 12 and possibly 14 outs, giving you a lot of equity if called, plus folding equity.