I read something about them recently and I'm pretty sure they did most if not all of it separately. Their brains are separate and they each control an arm so they can read and write separately but at the same time. They are able to coordinate to type.
I wonder how much they're able to read each other's thoughts. Being able to type sentences with their two separately controlled hands requires more than physical coordination. They seem like lovely people and I'm not trying to be rude but having watched the documentary it did kind of seem like one of them is more in charge and the other is following her lead (don't remember which is which).
There's no biology to support mindreading - but they would have had a lifetime of seeing what the other one chose to do in every second of every situation basically.
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u/deeesenutz 1d ago
Presumably they also had to only fill out one exam or write one paper as cheating would be effectively impossible to prevent as well.