In the 1946 "Silent and Verbal Levels" diagram, the arrows and boxes denote ordered stages in human neuro-evaluative processing that happens in an instant. Although newer knowledge in biology has more sharply defined what the text in these 1946 boxes labels "electro-colloidal", the diagram remains, as Korzybski wrote in his last published paper in 1950, "satisfactory for our purpose of explaining briefly the most general and important points". General semantics postulates that most people "identify," or fail to differentiate the serial stages or "levels" within their own neuro-evaluative processing. "Most people," Korzybski wrote, ""identify in value" levels I, II, III, and IV and react "as if" our verbalizations about the first three levels were 'it.' Whatever we may say something 'is' obviously "is not" the 'something' on the silent levels."