There are a wide variety of ways to test this, yet no significant link has been found. I see this hypothesis come up a lot on HN. It’s a favorite around here.

There are a wide variety of ways to test this, yet no significant link has been found. I see this hypothesis come up a lot on HN. It’s a favorite around here. Consider this: HN generally attracts the intelligent type of personality. What scares that type of personality most? Losing the gift of intelligence. What is the most common thing that can take that away? Dementia. How do you make yourself feel safer about such an unpredictable thing as dementia? Convince yourself that it’s caused by something that can easily be controlled with modern medicine - microbes. It’s not so scary anymore, is it?