Just as
linguistic expressions lead us to anticipate certain experiences, so for Berkeley certain experiences or immediate ideas are «natural signs» of others, as the sound of the coach is a sign of the sight of the approaching coach.8 The second realist version can be found in the writings of Thomas Reid, for whom sensations are signs of external objects.
This
leads Derrida to challenge both the philosophical presumption that
linguistic signifiers can convey an accurate picture of an extra-textual reality and the tendency of metaphysicians to privilege these philosophical assertions as higher
expressions of truth.