100% accuracy should be the goal, but the way to achieve that isn't going to from teaching an AI to construct a definitive sounding answer to 100% of questions.

100% accuracy should be the goal, but the way to achieve that isn't going to from teaching an AI to construct a definitive sounding answer to 100% of questions. Teaching AI how to respond with "I don't know", and give confidence scores is the path to nearing 100% accuracy.