I don't want to have a calculator (or say bookkeeping software) that gives correct results most of the time but not always, and then hear from the developers that it will get better with each iteration. I need a calculator that is correct 100% of time, not even 99.999%, because otherwise I can't rely on it at all.
In other words, the utility of a calculator that is correct only 99% of time is zero, since you can't even tell when it's wrong.
In other words, the utility of a calculator that is correct only 99% of time is zero, since you can't even tell when it's wrong.