I understand the general view presented by Sellars in "Empiricism and the Philosophy of Mind". Yet, I can't get rigorously convinced. The main point is shown in part XIII, specifically in section 35. Is there a way to draw a step by step clear explanation to the fact that in order to notice a sense impression we must have a concept of it and not the opposite? Why the mere responsive disposition report "this is red", does not have the authority, and how having an authority stands for the main argument?