What does apperceive achieve that perceive does not?
The connection between perception and consciousness is addressed in the essay.
Perception, that which is perceived, is sufficient.
Apperception/apperceive is more involved, less familiar and adds little if anything for functionality.
“Perceive” is sufficiently functional:
Perceive (verb)
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a : to attain awareness or understanding of
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: to become aware of through the senses
(Perceive. Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/perceive)
Perceive (verb)
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a. To become aware of (something) directly through any of the senses, especially sight or hearing
b. To cause or allow the mind to become aware of -
To achieve understanding of; apprehend
(American Heritage Dictionary of the English Language, Fifth Edition https://www.thefreedictionary.com/perceive)
“Perception” as well:
Perception (noun)
- the act or faculty of apprehending by means of the senses or the mind; cognition; awareness.
(Random House Kernerman Webster’s College Dictionary https://www.thefreedictionary.com/perception)