What seperates man from machine is not logic, but "illogic". I do not believe that machine will ever reach a point where it can make a truely "illogical" decision. They can program themselves to choose a random decision, but if they have to decide to make a random decision, then is it truely random?
Man can.
Computers can be more intelligent than man, but they will not be as wise. There is a difference. A machine meticulously weighs the pros and cons of situation and picks one based on which has the most "pros". If that option is not available, then it chooses the next logical one.
Man on the other hand does indeed weigh the pros and cons, and logic would tell us that the one with the most pros would be the right choice, but for some reason, not every person would choose that particular path. Man picks a path based on thier previous experiences, their mental stability, and their desire to prevail the task at hand.
One person, who is less risky would take the logical one. A person who is borderline suicidal or who is a thrill seeker would rise to the challenge and possibly take the last one on the list. Computers will never be able to match this. Sure, in a closed situation containing only a few choices, a computer could match a human; but, in the "big picture" such as the human evolution, the risk takers and the adventuresome will always be one step ahead of the logical and the safe betters. Call it a "gut instinct" if you will. A computer will never be able to mimic this irrationality of man.
Also - I offer this one final bit. Some people have a sixth sense of some sort. Some sort of ability to predict what will happen. For me, I can predict weather fairly well. I can't predict actual temperatures very well, but I can predict the severity of a weather pattern. I can often tell how soon a thunderstorm is going to hit, often as far as two days away. I do this with no weather satellites or no doplar radar. My record of juding rain is far more accurate than any weatherman. It's little things like this that will keep man ahead of machine. While my ability to predict weather may be rather unimportant, another persons abiltity to predict what another person may do may prove far more useful.
And, I believe if challenged, man will be able to improve these "6th" senses far beyond any of us believe.