topic vs cognitive content

topic and cognitive content both are nouns.

Word	Noun	Adjective	Verb	Adverb
topic	Yes	No	No	No
cognitive content	Yes	No	No	No

As nouns, cognitive content is a hypernym of topic; that is, cognitive content is a word with a broader meaning than topic:

topic: some situation or event that is thought about
cognitive content: the sum or range of what has been perceived, discovered, or learned

Other hypernyms of topic include content, mental object.

topic (noun)	cognitive content (noun)
some situation or event that is thought about	the sum or range of what has been perceived, discovered, or learned
the subject matter of a conversation or discussion