Why are economies never purely market or command economies?

It has to do with the governments system, whether it is a democratic republic, demo-socialist, communist, etc. This plays huge roles in their economic systems, causing it to vary country to country.

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

china has confucianism thats everywhere in asia but it isn't really a religion.