Complete Vs. Perfect Information
Complete and perfect information are importantly different. In a game of complete information, the structure of the game and the payoff functions of the players are commonly known but players may not see all of the moves made by other players (for instance, the initial placement of ships in Battleship); there may also be a chance element (as in most card games). Games of incomplete information arise most frequently in social science rather than as games in the narrow sense. For instance, Harsanyi was motivated by consideration of arms control negotiations, where the players may be uncertain both of the capabilities of their opponents and of their desires and beliefs. Games of incomplete information can be converted into games of complete but imperfect information under the "common prior assumption." This assumption is commonly made for pragmatic reasons, but its justification remains controversial.
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Famous quotes containing the words complete, perfect and/or information:
“Much that is urged on us new parents is useless, because we didn’t really choose it. It was pushed on us. It—whether it be Raffi videos, French lessons, or the complete works of Brazelton—might be just right for you and your particular child. But it is only right when you feel that it is. You know your family best; you decide.”
—Sonia Taitz (20th century)
“A perfect beauty of a sunflower! a perfect excellent lovely
sunflower existence! a sweet natural eye to the new hip moon, woke up alive and excited grasping in the sunset shadow sunrise golden monthly breeze!”
—Allen Ginsberg (b. 1926)
“We hear a great deal of lamentation these days about writers having all taken themselves to the colleges and universities where they live decorously instead of going out and getting firsthand information about life. The fact is that anybody who has survived his childhood has enough information about life to last him the rest of his days.”
—Flannery O’Connor (1925–1964)