=6. THE LOGIC OF THE PSYCHOLOGICAL TERMS INVOLVED IN THE NOTION.=
Concerning the knowing mind the psychologist classifies its activities and their products as follows:
_Activity_ _Product_ (1) Presentative (1) Sensation Sensation (2) Perception Percept
(2) Representative (1) Imagination } Image (2) Memory }
(3) Thinking (1) Conception Concept (2) Judging Judgment (3) Reasoning Inference
The notion as _any_ product of the knowing mind includes the _six_ products as indicated by the psychologist.
The individual notion which is intuitive includes the sensation, percept and image; the general notion which is a thought product stands for the concept, judgment and inference. To put it mathematically――
{ sensation } } Individual notion = { percept } = intuitive products } { image } } _notion_ { concept } } General notion = { judgment } = thought products } { inference } }
As we shall have occasion frequently to refer to these psychological terms it may be well to define them.
_Psychological Definition._ _Logical Definition._
A sensation is the first and A sensation is a vague, simplest mental result of the unlocalized mental product of stimulation of an incarrying the knowing mind. nerve.
A percept is a mental A percept is a consciously product which results from a localized group of sensations. consciousness of particular material things present to the sense.
An image is a mental product An image is a reproduced which results from particular percept. material things not present to the sense.
A concept is a representation A concept is a mental product in our minds answering to a arising from thinking many general name. notions into one class.
A judgment is the result of A judgment is the mental asserting an agreement or product arising from conjoining disagreement between two ideas. or disjoining notions.
An inference is a judgment An inference is a judgment derived from perceiving derived from antecedent relations between other judgments. judgments.
It is seen that the sensations furnish the raw material. Ignoring the few exceptions we may then say that a percept is a made-over group of sensations; a concept a thought-made group of percepts; a judgment a thought-made group of concepts; an inference a judgment derived from other judgments.