Bill Gates makes eminent sense, most of the time. One could not be both a college drop out and world’s richest man unless one is incredibly intelligent. In a recent report on the mHealth Summit, the Economist reports thus. Mr Gates, however, warned the participants not to celebrate too soon. Just because an m-health pilot scheme appears to work in some remote locale, he insisted, don’t “fool yourself” into thinking it really works unless it can be replicated at scale.