On The Phenomenology of Spirit (1807), ch. 1 "Sense Certainty" and ch. 2 "Perception."
We walk through the first step in considering Hegel's dialectical analysis of theories of knowledge. Sense-certainty claims that we have direct access to sensory particulars which can act as foundational. But can we really refer or point to a particular thing without bringing some universal concepts to bear, like "this" (which can refer to any number of things), as well as "here", "now" and even "I"?