The practice of general semantics brings consciousness, at silent levels, of the process of abstracting. We saw some of the main tools in these pages (extensional devices, Structural Differential, etc). Consequently we know that we should index this term to specify their meanings: consciousness of abstracting what, where-when, of whom, etc.
When an event (silent) occurs, that I would evaluate (verbally) by the sentence "I see the blue binder":

• "I" refer to me, here-now, and not to someone else, elsewhere or 10 years ago,
• "see" refers to my perception, result of the interaction between my organization with a something-outside-with-my-skin, aspect of a whole which constitute my evaluations,
• "blue" is a descriptive label of an aspect of my perception. There is not one "blue" even if we use the 'same' label to describe it. Someone else could feel it, silently, as what I would call " red ", even if we agree to call it "blue".