>95% of answers could be accurate. Combined with the 85% that are helpful and you have “85% of answers are helpful & accurate.”
Instead of using the lower bound, wouldn't it make more sense to say "85% of the 95% accurate answers are helpful"? Or perhaps "95% of the 85% helpful answers are accurate"?
In both cases, the number for "answers that are both helpful and accurate" is lower than 85%.
