Surpassing Human Level Performance
As technology is advancing so are our needs and hence we try if machines can automate all kinds of performance done by humans. Since humans are better at natural perception tasks than machines it is therefore impossible for machines to do such tasks with 100% accuracy. When the progress slows down after it has surpassed the human level it becomes difficult for us to increase the progress. This is the main problem why machines still lack in performing such tasks with 100% accuracy.