There is a stage before AI that has begun to merge into it - "expert system".
Very useful in some applications, modern ECG/EKG machines are "able" to "diagnose" the patient's condition quite accurately. In effect they do it in the same way a human would, comparing the amplitudes and times of the various parts of the heart waveform. Perhaps they do it better, humans can't spot very small differences by eye!
In aircraft the "expert system" can take over certain controls if need be. In most modern airliners this will happen if the landing is, say, the landing is too fast, too steep or too flat - or the wheels are still up! It has been said that even more decisions are being taken out of the hands of the pilots.
Then we come to the totally uncontrolled, unmonitorable (it seems) microsecond decisions taken by computers without reference to humans - other than a set of human produced algorithms - that now control the wealth of the world.
Cars are now becoming semi autonomous in terns of how the read and use the roads.
These systems are essentially dumb though, no actions outside those set by a human - so far. But, the day will come when, if by "accident" machines run by "expert systems" will kill people, or cause deep financial damage.