Stacking reveals physical inconsistencies in the manufacturing process. Weight imbalances would be a characteristic of one dice (and possibly not another). Wi

Stacking reveals physical inconsistencies in the manufacturing process. Weight imbalances would be a characteristic of one dice (and possibly not another). With sufficient rolls of one dice, you could say "yes, this dice is fair" (or not). But one dice isn't a representative indication of "if you buy a dice from X, how much attention do they pay to making dice consistently?" The claim of GameScience is that all their dice are consistently made and equally fair. If you buy a dice from Chessex, it may be fairish, it may not - it depends on how it cooled.