Following from the OP, please allow me to give my take on this topic using what I believe are the basic mental processes preceding the idea of 'knowing something'.
Sensation - The recognition of neural impacts by the 'mind' or 'mental process'. This means that the 'mental process' has determined that the brain has registered (recorded and categorized) an impulse which has come through any of its neural pathways.
The brain and the neural pathways act as both recording and filtering instruments. The vibrations from an external object (red light - light whose wavelength and frequency is within the range we identify as red.) reaches the nerve fibres through the specialized organs (in this case, the eyes, others sensory organs include the nose, tongue, etc.). Upon impact that vibration induces a nerve signal in the nerve fibres which is then carried to the brain. Each nerve signal is received as a unique impression and graded in accordance with its characteristics such that even minute changes produce minute differences in the nerve signal induced. The signals are then recorded in the brain, each signal in its own domain. (Signals from the nerves in the eyes are recorded separately from those in the nose or skin.) In this way the neural organization is the first filter. From there, the 'mind' applies its own processing towards identifying the impulse and determining a channel of response.
A major part of the mind's process is what we refer to as attention.
Attention - The focus or distinct application of concentrated awareness towards an object/subject.
"The real truth is that we become conscious of the report of these senses only when the attention is directed toward the sensation, voluntarily or involuntarily. That is to say, that in many cases although the sense nerves and organs report a disturbance, the mind does not become consciously aware of the report unless the attention is directed toward it either by an act of will or else by reflex action. For instance, the clock may strike loudly, and yet we may not be conscious of the fact, for we are concentrating our attention upon a book; or we may eat the choicest food without tasting it, for we are listening intently to the conversation of our charming neighbor." -
From
Your Mind and How to Use It by William Walker Atkinson.
Perception - The interpretation or characterization of the acquired sensation by the mind. This process relies heavily upon memory and, sometimes, a little upon the imagination.
"While perception depends upon the reports of the senses for its raw material, it depends entirely upon the application of the mind for its complete manifestation."
"A sensation is a simple report of the senses, which is received in consciousness. Perception is the thought arising from the feeling of the sensation. Perception usually combines several sensations into one thought or percept. By sensation the mind feels; by perception it knows that it feels, and recognizes the object causing the sensation."
"Sensation merely brings a report from outside objects, while perception identifies the report with the object which caused it. Perception interprets the reports of sensation. Sensation reports a flash of light from above; perception interprets the light as starlight, or moonlight, or sunlight. Sensation reports a sharp, pricking, painful contact; perception interprets it as the prick of a pin. Sensation reports a red spot on a green background; perception interprets it as a berry on a bush."
"Moreover, while we may perceive a simple single sensation, our perceptions are usually of a group of sensations. Perception is usually employed in grouping sensations and identifying them with the object or objects causing them. In its identification it draws upon whatever memory of past experiences the mind may possess. Memory, imagination, feeling, and thought are called into play, to some extent, in every clear perception."
"The infant has but feeble perception, but as it gains experience it begins to manifest perceptions and form percepts. Sensations resemble the letters of the alphabet, and perception the forming of words and sentences from the letters. Thus c, a, and t symbolize sensations, while the word “cat,” formed from them, symbolizes the perception of the object." - From
Your Mind and How to Use It by William Walker Atkinson.
Conception - The process by which we create or develop objects/subjects in our minds in relation to the external objects and subjects perceived.
From perception, through processes such as reference to memory, abstraction, comparison, classification, generalization, imagination, etc., we create, build or develop an object/subject in our minds which bear characteristics which are similar or relatable to the external objects/subjects.
Therefore, that relationship between the concept and the external object/subject is what I refer to (not conclusively) as 'knowing'.
(Sorry, it turned out to be reeeaaally long.)
:gasp: