Is centre of mass of reality ?

Is centre of mass a reality?

Does centre of mass of a body actually exist in reality? Does centre of mass of a solid body lie necessarily Inside it ?

Is centre of mass always a reality ?

Define centre of mass of a body. Give the location of centre of mass of a sphere.

Assertion : The centre of mass of a body may lie where there is no mass. Reason : The centre of mass has nothing to do with the mass.