Guessing

thumb|right|350px|The hypothesis of Andreas Cellarius, showing the planetary motions in eccentric and epicyclical [[orbits]]

thumb|right|The exact number of candy pieces in this jar cannot be determined by looking at it, because not all of the pieces are visible. The amount must be guessed or estimated. Guessing is the act of drawing a swift conclusion, called a guess, from data directly at hand, which is then held as probable or tentative, while the person making the guess (the guesser) admittedly lacks material for a greater degree of certainty.