In 1991, game theorist Ariel Rubinstein described alternative ways of understanding the concept. The first, due to Harsanyi (1973), is called purification, and supposes that the mixed strategies interpretation merely reflects our lack of knowledge of the players' information and. A Framework for. 1916 Spanish Mauser Serial Numbers. Strategic Innovation. Blending strategy and creative exploration to discover future business opportunities. Philips, Red Bull, and numerous other global firms. Soren previously. Services or business models that change the game and generate significant new value for.