It's like a flea market. Bargain bin discounts, junk to many, valuable to some, but it shifts the economics of the whole system and lets specialty niche researchers not have to reinvent the wheel.

Also, knowing that a method or study was statistically insignificant is statistically significant for future study design.

Thanks!

Note that the pressure of the air changes with height. For a few inches the change is negligible and very difficult (impossible?) to measure, but the effect must be out there.

I had once a problem with the temperature of the room, you usually ignore it, but it has a bigger effect like a 5% variation.

For one dumb example: if you wanted to see if rats can fly, you might observe 100 rats and see that none of them fly away. But this doesn't prove anything: in reality even if 3% of rats could fly you'd get this result about 5% of the time. You've really shown with 95% confidence is that less than 3% of rats fly.