'brel tshad

reason of non-perception of a related fact, sign which is an non-observation of a related object [a kind of possibly apparent but unperceived true reason, above the basis of dispute, for dharmas to be refuted, the non- affirming negation that certainly establishes that they do not exist is joined to the sign. eg, "On the dharmin a treeless rock fortress, there are no shapa trees, since it is treeless."] [IW]

sign which is a non-observation of a related object [RY]

reason of non-perception of a related fact, sign which is an non-observation of a related object [IW]