Plot hole: The demonstration to the Board of the system's potential is ported through acoustic modems. Even in those days (early 1980s), anyone would have realized that the bandwidth simply wasn't possible at 300 bps.
Brainstorm (1983)
1 plot hole - chronological order
Directed by: Douglas Trumbull
Starring: Christopher Walken, Cliff Robertson, Natalie Wood, Louise Fletcher
Factual error: When the Brainstorm project is taken over by the sinister military operative Landan Marks, he begins weaponizing the brain-interface technology and testing it on the human guinea pig Gordon Forbes. As Gordon is subjected to increasingly difficult fighter-jet simulations, Landan Marks gleefully exclaims to military observers, "Now watch this! He can take a full 10-G rollout without losing control, just by thinking about it!" In the flight-simulator cockpit, Gordon grimaces, but the Brainstorm device allows him to remain conscious and maintain control despite his physical distress. But the fact is that no flight simulator in the 1980s or even today would be able to simulate extreme G-forces as described in this film. In fact, flight simulators then and now can't approximate even low G-forces. Only a giant centrifuge can produce such forces; but Gordon is not in a centrifuge for this scene. It's simply a flight simulator.
Dr. Michael Anthony Brace: When I found her, she looked so peaceful. Why do you have to die to let go? All my life, I never needed anybody... And now, because of this thing she left me, I'm scared. For the first time in my life, I'm scared. But the thing is, I like it. I want more. You're married to a man who has a chance to take a scientific look at the scariest thing people ever have to face. I've gotta do this... gotta play that tape, and you gotta help me.
Trivia: Natalie Wood drowned while the film was still being made. The movie was almost canned.