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You get parazapper his approval from the FDA to do real conclusive whatever kinds of proof you need (if you can), possibly wasting a cool million or so bucks in the process, and finance what equipment is needed (probably the FDA dictates that to get their brother-in-law more money) for these 'proofs'.
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This excuse has been debunked again and again, all we ask is an objective proof from an experiment done at home in a scientific way. There is no excuse to not do that, Royal Rife has done many, Hulda Clark has done many, but Parazapper, after all these years, after all these sales and accumulated money, can't do one. Why ? What is your next excuse ?