Extra
Most of us are unable to sort out reality — we can't distinguish between a thing and a symbol for that thing. This springs from several causes. One cause is that we are isolated from the natural world, where the distinction between a thing and a symbol is more obvious. Another cause is our educational system, which simply reflects the intellectual laziness of the society in which it is embedded. A third cause is resistance on the part of vested interests — if we could think creatively, we would be difficult to govern, and advertisers would have to appeal to reason instead of emotion.
It is no accident that modern education doesn't teach the distinction between symbol and thing — if it did, education as we know it would fall apart. After that, after education reshaped itself to provide actual knowledge instead of the symbolic representation of knowledge, the society around us would be transformed.
But in the meantime, most "educated" people cannot tell the difference between a fact and an idea, the most common confusion of symbol and thing. Most believe if they collect enough facts, this will compensate for their inability to grasp the ideas behind those facts.