How did Becquerel's results allow him to conclude that something other than phosphorescence was
causing the film to darken?
His results showed that uranium not exposed to light still produced the same effect as uranium
exposed to light.
His results showed that any rock will darken film
His results showed that only uranium exposed to light produced the darkening effect on the film,

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