Thus although in synthetic judgments we cognize a priori so much about space in general or about the shapes that the productive imagi nation draws in it that we really do not need any experience for this, still this cognition would be nothing at all, but an occupation with a mere figment of the brain, if space were not to be regarded as the condition a Principien reinen Gegenstand; Erdmann suggests keinem Gegenstand,.e., no object.