（1） Existence and non-existence （Skt. bha^va-abha^va; Tib. dn%os dan% dn% med）. The tendency to interpret our reality as one or the other of these two extremes is a basic premise of Buddhism， and is one of the most important connotations of the term middle way 中道. （2） A way of expressing the notion of emptiness and existence 空有.