your saying that there are stories when more than one person is summoned and what difference does it makes when two people receive same memory .
see if its possible to put a lot memory of one person into another person what will happen to receiver?
example person A is sending his memory to person B.
for example we imagine that person A is a good guy and person B is a bad guy.
which memory will dominate?
either the A or B
suppose if A memory is dominating and the person A can control his emotions he uses his knowledge for good purposes
suppose the B memory is dominating and the person B can control he uses that knowledge for bad purposes like he always do.
what exactly does neuroscience do for a protagonist?he can use the memory transfer technique he knew in story to create a huge plot twist.
and the thing i mentioned that "why should only one person receive the memory" it is indicating that have you ever saw a good novel where there is more than one MC with the same memory and brain?
dont mention summoning because even in summoning two people dont have same brain and memory.
i gotta admit that you are the dumbest person i ever met in my life till today