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From Clear's Silat Phase 1 Vol 8: Upper Body Art
A destruction is any technique that disables part of the opponents body for 26 minutes or longer. Beyond the duration of the fight.
This could be anything from nasty charlie horse that takes out the arm for a little less than half an hour to a broken limb that will never heal right again.
Offensive and defensive applications are covered in detail on our Phase 1 DVDs. It is available here:
► https://store.clearsilat.com/collections/silat