Gemme theory is a study o strategic deceesion makin. Mair formally, it is "the study o mathematical models o conflict an cooperation atween intelligent rational deceesion-makers". An alternative term suggestit "as a mair descriptive name for the discipline" is interactive deceesion theory. Gemme theory is mainly uised in economics, poleetical science, an psychology, as well as logic an biology. The subject first addressed zero-sum gemmes, such that ane person's gains exactly equal net losses o the ither pairticipant(s). The day, however, gemme theory applies tae a wide range o behavioral relations, an haes developed intae an umbrella term for the logical side o deceesion science, tae include baith human an non-humans, lik computers.