Herbart next posits a second idealized[21] case, in which the opposition is only partial, not “full”, as above. In this case, he says, one representation could remain fully uninhibited even if the other were inhibited only to a certain degree (PsW: 139, ff.)[22] He now asks: Given representations a and b, by how much would each of the two completely opposed representations be inhibited? The inhibition of each individual representation may be found only if we first know the “inhibition sum” (S).[23] 