  To explain how this process works, he uses an example that, after him, became a standard example used to explain singular cognition. In the example, Socrates approaches from afar. At first, I cannot tell exactly what I see approaching; something (a substance) is coming closer and closer to me. After a while, I see that it is an animal of some sort, but I cannot tell exactly what kind of animal it is. As it comes closer, I realize that it is a human being, and, finally, when he is close enough, I recognize Socrates (see Normore 2007).