 The power of expert systems came from the expert knowledge they contained . They were part of a new direction in AI research that had been gaining ground throughout the 70s . " AI researchers were beginning to suspect — reluctantly , for it violated the scientific canon of parsimony — that intelligence might very well be based on the ability to use large amounts of diverse knowledge in different ways , " writes Pamela McCorduck . " [ T ] he great lesson from the 1970s was that intelligent behavior depended very much on dealing with knowledge , sometimes quite detailed knowledge , of a domain where a given task lay " . Knowledge based systems and knowledge engineering became a major focus of AI research in the 1980s . 
 The power of expert systems came from the expert knowledge they contained . They <a href='uninflect' title='1'><mark>were</mark></a> part of a new direction in AI research <a href='null_relcl' title='2'><mark>that</mark></a>had been gaining ground throughout the 70s . " AI researchers <a href='uninflect' title='3'><mark>were</mark></a> beginning to suspect — reluctantly , for it violated the scientific canon of parsimony — <a href='null_relcl' title='4'><mark>that</mark></a>intelligence might very well be based on the ability to use large amounts of diverse knowledge in different ways , " <a href='uninflect' title='5'><mark>writes</mark></a> Pamela McCorduck . " [ T ] he great lesson from the 1970s was that intelligent behavior depended very much on dealing with knowledge , sometimes quite detailed knowledge , of a domain where a given task lay " . Knowledge based systems and knowledge engineering became a major focus of AI research in the 1980s . 
The power of expert systems came from da expert knowledge they contained . They was part of a new direction in AI research had been gaining ground throughout tda70s . " AI researchers was beginning to suspect — reluctantly , fir it violated thdacientific canon of parsimony — intelligence might very well be based on the ability to use large amounts of diverse knowledge in different ways , " write Pamela McCorduck . " [ T ] he great lesson from the 1970s was that intelligent behavior depended very much on dealing wid knowledge , sometimes quite detailed knowledge , of a domain where a given task lay " . Knowledge based systems and knowledge engineering became a major focus of AI research in the 1980s .