The human body strives to maintain homeostasis, the state of balance between internal and external change.
Because in that way we keep thinking about them. How can you forget something when you're thinking about it?!
Answer:
scientific conclusions are reliable as they are helpful for many things however it is true that after the evolution of new ideas the old theory have some changes or may change fully or may be proved wrong but yeah the old theories are still helpful for many reasons and things.
so I think scientific conclusions are reliable