False memories: Total Recall never needed the machine
False memories are not just a Total Recall idea: a badly worded question creates them. A police officer explains why the witness is the most fragile evidence.
LA CIENCIA DEL BUCLE
Jose M. Aldasoro
10/12/20265 min read
In Total Recall, a construction worker walks into a company called Rekall to have a memory implanted of a holiday on Mars he has never taken. It takes a chair, a needle and a machine the size of a room. Philip K. Dick imagined the business in a 1966 short story and Verhoeven filmed it in 1990. Both got the same thing wrong: the machine is unnecessary. To put a false memory into someone’s head, all you need is to ask them a question badly.
One verb changes what you saw
In 1974, the psychologist Elizabeth Loftus showed several groups the same film of a car accident and asked them to estimate how fast the cars were going. She changed a single word. Those asked how fast the cars were going when they “smashed” into each other answered, on average, 41 miles per hour. Those asked how fast they were going when they “hit” each other said 34. They had watched exactly the same thing.
The unsettling part came later. A week on, the people who had heard the stronger verb were far more likely to say they had seen broken glass on the road. There was none in the film. The question had not distorted an opinion: it had added an object to the scene.
Some case files are altered without anyone touching a single sheet of paper. If you want to read the one ZEUS tried to erase, the case file I share with my subscribers is here.
Can a whole memory be implanted?
Loftus took the next step in 1995, with Jacqueline Pickrell. She gave 24 volunteers a booklet with four episodes from their childhood, as told by a relative. Three were true. The fourth, getting lost in a shopping centre at the age of five and being rescued by a stranger, was invented. Around a quarter ended up remembering it, and some supplied details nobody had given them.
The experiment has its critics, and that should be said: the sample is small, and Loftus herself admitted years later that nobody had ruled out that some participant really had got lost without the family knowing. Nor did the field’s most striking figure hold up. A 2015 study announced that 70% of its participants came to remember a crime they had not committed; other researchers recoded the data and brought it down to between 26% and 30%.
I will take the small number, which is already enormous. One in four. No chair and no needle.
An 1882 law knew it before psychology did
This is where a police officer reads these experiments without surprise. Anyone who has taken a statement knows the witness is not lying when they get it wrong: they tell you, with complete conviction, what they remember, and what they remember already includes what they overheard in the doorway, what the neighbour told them and the way the question was put.
That is why procedure defends itself against memory more than against the liar. Witnesses are separated before they compare notes. You start with a free account and leave the specific questions for the end. And Spain’s Criminal Procedure Act, which dates from 1882, already required an identity parade to be made up of people of similar appearance and, where there are several witnesses, each to make the identification separately and without communicating with the others. Almost a century before the Loftus experiment, someone had understood that one witness contaminates another.
When that care fails, the cost is known. In 2015, the American organisation the Innocence Project stated that more than 70% of the 333 people exonerated by DNA up to then had been misidentified by someone. Nobody implanted anything in those witnesses. They simply remembered.
And everything the witness says ends up passing through a second pair of hands, those of whoever writes it down. I have said before that every police report is a story and it has an author.
If the day repeats, who remembers it?
The Loop takes place in a world trapped in a 24-hour cycle. I am not going to say who keeps the memory of the previous lap and who does not. I will say why it interested me: in a day that resets, not a trace is left, not a sheet of paper, not a camera. The only proof that yesterday existed is that someone remembers it. And we have just seen what that is worth.
It is also why I wrote about what a time loop really is and why fiction fakes it: almost every story in the genre takes it for granted that the protagonist remembers accurately.
The part Dick did get right
In the original story, the protagonist cannot tell the memory he bought from the one he lived. That much is exact. A false memory does not feel any different from a true one: it comes with the same image, the same emotion and the same certainty.
So the uncomfortable question is not for the witness, but for you. Of everything you would swear you saw with your own eyes, how much were you told afterwards?
Next read
Every police report is a story and it has an author
The police officer who writes the thrillers of the future.
© 2026 Jose M. Aldasoro