whilst @richard @carl this is not directly related to Keto the study (which Robert Lustig posted on FB shows a scientist taking the right approaches to studies, the key paragraph that should be used for ANY study.
Finally, we see a big limitation: This data reveals only correlations, not conclusions. We are left with at least two different interpretations of the sudden spike in “iPhone slow” queries, one conspiratorial and one benign. It is tempting to say, “See, this is why big data is useless.” But that is too trite. Correlations are what motivate us to look further. If all that big data does — and it surely does more — is to point out interesting correlations whose fundamental reasons we unpack in other ways, that already has immense value.
And if those correlations allow conspiracy theorists to become that much more smug, that’s a small price to pay.