chewing gum vs knowledge ???

chewing gum vs knowledge ???
Students who chewed gum for five minutes before taking a test got better marks than those who didn't chew gum.

Previous research has shown that any type of physical activity improves brain performance, but this study shows that even minor physical activity can do so.

The benefits of chewing gum occurred only when it was done for five minutes before a test, not if it was done during the entire test. This may be because chewing and thinking conflict with each other, Onyper suggested in a university news release