Anti-branes in the deformed conifold are used for example to construct de Sitter vacua. In the probe approximation, they lead to a metastable state. I will present work done over the last three years to go beyond the probe approximation by taking into account the back-reaction of the anti-branes. To be, or not to be (a metastable state), that is the question. We are pinning down the answer.
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