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It 's like saying that those driving games in arcades make for irresponsible drivers . If they are good using computers , they sometimes think they would be good computer science majors , but this is like assuming that , if you can drive a car well , you would be a good engineer or mechanic . However , a primary interest is in seeing that an expression IS a function of a variable , and another different expression is another distinct function of the variable . One way of describing what one fears is left out is by saying that functionalism does not seem to account for our own inner experience of our mental states . The best way I can explain it to you is by saying that , for a second or two , I felt as though , instead of going to the centre of a continent , I were about to set off for the centre of the earth . Our interest in vital statistics is in assuring that reliable , high quality statistical information is provided as rapidly as possible .