Our internal brain cannot hold many thoughts at the same time. The accuracy is also terrible1.
We need a personalized knowledge storage system. Books, papers, articles, etc. are humanity’s external brain, but they are not specific to one’s existing experience and knowledge. In other words, they are too general.
Like our internal brain, it should accommodate easy association. Therefore, tools for Ideas of connected ideas are useful.
“The palest ink is more reliable than the most powerful memory.” https://ask.metafilter.com/247533/Is-this-really-an-ancient-Chinese-proverb or “The shortest pencil is longer than the longest memory” ↩