Immediate awareness, either of the truth of some proposition, or of an object of apprehension such as a concept. Awareness of the passage of time, or of the ineffable nature of God, have equally been claimed as intuitions. The notion is frequently regarded with suspicion, as simply labelling the place where the philosophical understanding of the source of our knowledge stops. In the philosophy of Kant intuition (Anschauung) has an empirical form, covering the sensible apprehension of things, and as pure intuition it is that which structures sensation into the experience of things in space and time.