4 ms·

What would be surprising to me is that they found air pollution makes Alzheimers less likely. If it accelerates it that's unfortunately but I'm not surprised.

• aaron695 10y ago
  I think the default would be has no effect.
  • nonbel 10y ago
    Why? I am not being trite. Why should we assume "no effect", or "no correlation", rather than "everything has some effect on everything else" and "everything is correlated with everything else"?