A thing includes objects, qualities, relations or any existing entity. A thing is that which has individual existence.
(5) A bit of knowledge must have been a notion of some one’s mind, but may not necessarily be a notion of your mind. Knowledge may be found in books, but a notion is a mental product found only in the mind. Idea is ambiguous, though its meaning is usually restricted to an image, a meaning or a belief.
(6) The products of the knowing mind are the sensation, the image, percept, concept, judgment, inference.
The sensation, image and percept are individual notions, while the concept, judgment and inference are general notions.
A sensation is a vague, unlocalized product of the knowing mind.
A percept is a consciously localized group of sensations.
An image is a reproduced percept.
A concept is a mental product arising from thinking many notions into one class.
A judgment is a mental product arising from conjoining and disjoining notions.
An inference is a judgment derived from antecedent judgments.