I had just rewatched Used Cars last week. The villain has someone edit the car lot owners voice for a commercial so they can be nailed for false advertising. The audio edit is comically obvious to the point of being a Simpsons gag, but it got me thinking if the idea of audio splicing was so alien to the general population in 1980 that nobody would think twice that it was a fake. Sort of like if you tried to use Rogue One's CGI Grand Moff Tarkin as incriminating video evidence against Peter Cushing in 1977 and everyone believed it.