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.

The UV nail polishes generally have some kind of acrylate. Every time you come into contact with uncured acrylates, there is a chance of developing an allergy to it, which means that the use of medical acrylates becomes much more dangerous if not impossible.