Adding it into the weights would be quite hard, as you would need many examples of text where someone is not sure about something. Humans do not often publish work that have a lot of that in it, so the training data does not have examples of it.

You don’t even need the movies to have some dystopian implant horror. Second sigh used to produce a sight restoring implant. After some financial trouble they stopped manufacturing and support for one of their products. Leaving recipients of the implant sightless in the case the hardware breaks.

https://www.bbc.com/news/technology-60416058