the cheating section isnt accurate about the use of precision dice The ambition is for fairer dice so in a way an anti cheating But a prcision dice is one where all of the sides are smooth so that there are no indentations This has two effects  the dice roll more consistantly  that it becomes more difficult to feel the spots of the dice The latter is a method by cupping a finger around a die so that only one of the dice is being shaken and then rolling the dice  so no precision die by definition can be loaded which would still be needed for a magnetic dice But it could be a loaded dice But loaded dice are of limited value and easily detected