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I understand the basis for "loopy story telling" to be a better way to think about science. While I can comprehend how things can never be proven true, I'm not sure that it is a concept my 3rd graders would understand. I would however, explain to them the idea that something needs to be tested and retested several times and many, many observations must occur. Also, I would explain that the students that the experiments we conduct in class are only small samples. I really like the idea of explaining hypothyesis as a summary of prior observations.