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[*Joe and Paul are fishing from either end of their tinny. "You know what I like most about fishing?", says Joe. "Is it catch fish?", replies Paul over his shoulder. Facing each other Joe says "Umm, no, it's observing the periodicity of the waves." Paul looks a bit sceptical. They resume fishing and looking out from each end of the tinny. Without looking round Paul says "It was 'catching fish', wasn't it." Joe doesn't move and quietly says "... yes ..."*]

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