There are thus two uses of reason, which, regardless of the universality cognition and its a priori generation, which they have common, are nevertheless very different in procedure, precisely because there are two components to the appearance through which all objects are given to us: the form of intuition (space and time), which can be cognized and determined completely a priori, and the matter (the physical), or the content, which signifies a something that is encountered in space and time, and which thus contains an existence and corresponds to sensation.