I don't think this statement has scientific basis. Many times it may be because of a situation at that time, and then use this sentence to describe people who are a little stupid and don't think. This sentence is gradually recited by more and more people, and then some people think it is true, but it is not entirely true because too many people say it. Maybe this sentence was just a joke at first, and then it was sung by everyone.

Sometimes the mind is simple and the limbs are developed. It describes that if a person is doing coolies, then there is no need for mental work, so this person's mind will be simpler and less scheming. I think it's ok to describe a person as simple and honest, but with a simple mind and developed limbs, it's a bit stale now. Some people swear with simple limbs, which shows that this person is stupid. But in fact, I think it will be more simple or less thoughtful.

In fact, many proverbs have been handed down before, probably because of an allusion. But it doesn't mean that there must be a very good sentence in this sentence. It can only be said that it is some popular words that I feel from my life. So the simple mind and developed limbs are not what we always think, but because of the body.

Simple mind and developed limbs are used to describe people who are coolies or don't like thinking very much. They don't work with their brains, nor are they mental workers. Nowadays, many people really do mental work, and people should still be fat, so this sentence cannot completely describe everything.