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:
“What I expect from my male friends is that they are polite and clean. What I expect from my female friends is unconditional love, the ability to finish my sentences for me when I am sobbing, a complete and total willingness to pour their hearts out to me, and the ability to tell me why the meat thermometer isn’t supposed to touch the bone.”
—Anna Quindlen (20th century)
“... A La Recherche du Temps Perdu is like a beautiful hand with long fingers reaching out to pluck a perfect fruit, without error, for the accurate eye knows well it is growing just there on the branch, while Ulysses is the fumbling of a horned hand in darkness after a doubted jewel.”
—Rebecca West (1892–1983)
“The information links are like nerves that pervade and help to animate the human organism. The sensors and monitors are analogous to the human senses that put us in touch with the world. Data bases correspond to memory; the information processors perform the function of human reasoning and comprehension. Once the postmodern infrastructure is reasonably integrated, it will greatly exceed human intelligence in reach, acuity, capacity, and precision.”
—Albert Borgman, U.S. educator, author. Crossing the Postmodern Divide, ch. 4, University of Chicago Press (1992)