International Journal of Scientific and Research Publication (IJSRP)
The information encoded on a computer may have a negative or a positive emphasis. Negative information refers to the statement that some situations are impossible. It is often the case for pieces of background knowledge expressed in a logical format. Positive information refers to observed cases. It is often encountered in data-driven mathematical models, learning, etc. The notion of an "If..., then..." rule is examined in the context of positive and negative information. The authors know that the classical logic is two valued true and false.