Expert systems are intelligent computer programs which use knowledge and inference procedures to solve problems. Their help in some areas is a final one. because for solving some problems a lot of intellectual effort should be made but inference procedure can be considered like a reflection model of the best qualified expert person from that area. In this article the logical compositi... https://www.jmannino.com/mega-pick-Royal-Nomadic-5413-Rug-Ivory-Black-limited-super/