Logseq seems to improve our brain's heuristic search speed more than I expected

Agree, but as the random data increased it I began to wonder why. I couldn’t offer the sample size because it just an instinct, a simple thought.

I think people’s reaction counts. but we can never make sure everything, is just a feeling or intuition.

That’s why led us to Wikipedia or Britannica matters.

question: when reading online or in books, I can find something super intrigues me. I call it spark. Usually in helps me memories a memory before long-forgotten memories.

It sounds like you're describing an experience of associative memory, where something you read triggers a connection to a past memory. This "spark" can be a powerful tool for learning and remembering. Here are some relevant concepts and theories:
"Associative Learning": This is a theory that states that ideas reinforce each other and can be linked to one another. This process can help you remember information by associating it with a memory.
"Schema Theory": This cognitive framework or concept helps individuals organize and interpret information. Schemas can help you connect new information to existing knowledge structures, which can enhance recall.
"Episodic Memory": This type of memory involves recollection of specific events, situations, and experiences. Your "spark" might be a form of episodic memory being triggered.
"Context-Dependent Memory": This theory suggests that memory recall is most efficient when an individual is in the same context as the information was learned.
If you want to explore these concepts further, you might find books like "Principles of Learning and Memory" by Robert A. Bjork, "Schemas in Problem Solving" by Camilo Taborda, "Memory and Emotion: Interdisciplinary Perspectives" edited by Bob Uttl, Nobuo Ohta, and Amy Siegenthaler, and "Context Effects on Embodied Representation of Language Concepts" by Olga Kukona to be helpful.
Remember, these "sparks" can be a wonderful way to enhance your learning and remember forgotten memories. Harnessing them can make your reading experience more enriching and personal.

Once you understand these proper nouns, you can build deeper thinking or quetions, and hook these professional knowledge to your personal feelings.

Quotes too, you can verify the answer on the internet. trace back to the original book, then ask questions using the paragraph.