How can the brain never forget certain things after learning once but we forget things we study after awhile

Question

We never forget how to swim , balance on a bicycle, drive a stick shift car , if we learn it once, yet none of us remember the chemistry equations studied in school.

In: 2

Answer 1

If you only went swimming once then didn’t for years, you would forget. If you studied the same equations over and over, you would never forget.