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  • Firstly- did you mean to write casual then causal?

    No, I meant it the way I wrote it - 'causal' in both cases.

    Secondly, and anyway, the causality is enhanced for the reason below

    I agree there is a positive correlation, and I am sure I don't have to wheel out the overused 'correlation does not equal causation' because you obviously know your stuff- but what made the researcher think that it was the fish oil that was having the effect ?

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