First when the user guesses a product will be close to NUMBER@1 but is n't sure whether it will be slightly less or slightly more than NUMBER@1 , the folded scales avoid the possibility of going off the scale .

First when the user guesses a product will be close to NUMBER@1 but is not sure whether it will be slightly less or slightly more than NUMBER@1 , the folded scales avoid the possibility of going off the scale .
