High error rate?! I said precisely moving several complex muscles to vocalize a concept that requires simulating not only how I perceive it but how both the directed receiver and other listeners will as well while focusing my eyes rapidly on an area the size of a quarter.
Try doing that a couple times in a row, recording the audio and video. Can you do it the same way twice, with a measure of "same-ness" that can be trivially computed? No, humans cannot do that.
Error rate in the context of computing does not need to mean invalid, just different. Our astonishingly high abilities to compensate for variations in input data do not result from an ability to produce output data repeatably.
