>Studies like this make you question how much of our folk knowledge and wisdom is false
If you really start to try making hypotheses and then test them objectively, and keep an eye on your track record, it starts to become surprising that folk wisdom ever turns out to be true. A maddeningly small minority of plausible hypotheses are actually true, and confirmation bias is strong. If you haven't already, you should probably just go ahead and cut your confidence about everything you think you know in half - especially if it isn't backed by hard science.
If you really start to try making hypotheses and then test them objectively, and keep an eye on your track record, it starts to become surprising that folk wisdom ever turns out to be true. A maddeningly small minority of plausible hypotheses are actually true, and confirmation bias is strong. If you haven't already, you should probably just go ahead and cut your confidence about everything you think you know in half - especially if it isn't backed by hard science.