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“At Amazon we’d always start with the customer and work backwards. You can’t completely prove something before building, but you need to be able to make reasonable inferences. There should be a model that can predict relative success.” paraphrasing @sladner 🙌 @sats_ko @elledog https://buffer-media-uploads.s3.amazonaws.com/5a6a991709293bf206c2a333/6c0847d05bd08929d90e7b4d322065b9599c1542_4a99855a387ecf071169024cd37fbf6c3840f5f9_twitter