Seems to me a case of Simpson's Paradox, already proven to be the cause of wrong conclusions in the past in similar stories: https://en.wikipedia.org/wiki/Simps

Seems to me a case of Simpson's Paradox, already proven to be the cause of wrong conclusions in the past in similar stories: https://en.wikipedia.org/wiki/Simpson%27s_paradox https://en.wikipedia.org/wiki/Simpson%27s_paradox