What happens when you go looking for evidence but don't find it? For example, if you believe that regulation imposes costs to innovation, but there is no evidence to support it? One George Mason professor dd something unusual -- he published.
https://washingtonmonthly.com/magazine/april-may-june-2018/null-hypothesis/
https://washingtonmonthly.com/magazine/april-may-june-2018/null-hypothesis/