How do scientific law differ from scientific theory

A scientific law is when something has already been proven with facts, which a scientific theory is something that has been questioned and may not be true.

Scientific law is when it cannot be changed, but theory can.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later