SheltieChe
Forums Sage
Here is story of Clever Hans, horse that could answer any questions if they had mathematical answer. He would tap his foot correct number of times. It was quite a mystery for while how he did that until it was found that in order for Hans to be able to answer there had to be at least one person who knew the answer because when Hans was tapping his foot down, at the right count that person usually will take audible breath or release tension of the body which smart horse picked up... took them a while to figure it out...
http://www.animalethics.org.uk/clever-hans.html
http://www.animalethics.org.uk/clever-hans.html
