Commonsense reasoning based on fuzzy logic
Lotfi A. Zadeh · 1986
Although most human reasoning is approximate rather than precise in nature, traditional logical systems focus almost exclusively on those modes of reasoning which lend themselves to precise formalization. In recent years, however, in our attempt to design systems which are capable of performing tasks requiring a high level of cognitive skill, it has become increasingly clear that in order to attain this goal we need logical systems which can deal with knowledge that is imprecise, incomplete or not totally reliable.