Taking notes that survive

Here is an experiment worth running. Find notes you took two months ago and try to use them. Most students discover that their notes are either a transcript of something they no longer remember the context of, or so compressed as to be cryptic. Either way, they are re-reading the source.

AI makes this worse in a specific way and better in a specific way, and the difference is entirely about who does the compressing.

Why AI-generated notes feel useless later

If you ask for a summary of a paper and save it, you have saved its compression of the source, not yours. When you come back, it reads like something a stranger wrote, because it is — the sentences carry none of your reasons for caring, none of your objections, and no trace of what was hard.

Your own notes, however scrappy, are indexed to your memory. They contain the thing you found surprising, phrased in the way you were thinking about it, which is why a three-word note of your own can restore a whole argument while a polished paragraph you did not write restores nothing.

So: the compression must be yours. That is the non-negotiable part. Everything else in this lesson is about making it fast.

The four-part note

One note per source. Four parts, and it fits on half a page.

The claim, in one sentence, in your words. What does this argue? If you cannot write it, you have not finished pass two.

The evidence, in two or three lines. What did they actually do — measured what, on what, how many, where? This is the part students skip and the part that lets you evaluate anything later.

Your reaction. Do you believe it? What is weak? What does it contradict? What did it make you think of? This is the most valuable part of the note and it takes thirty seconds. It is also the part that becomes your essay's argument, because an essay is largely a structured version of your reactions to a literature.

Two quotes with page numbers, maximum. Exact, in quotation marks, with the page. Two, not twenty — the discipline of choosing two is what makes you decide what matters, and it prevents the note becoming a transcript.

Ananya wrote twelve of these. Her essay's argument is visible in the reaction lines, read end to end, before she wrote a word of the draft.

Where AI helps, without doing the compressing

Checking your note against the source. "Here is a paper and here is my one-sentence summary of its claim. Have I misrepresented it? Is there a more central claim I have missed?" You compressed; it audits. This is the best single use of AI in note-taking and it catches genuine misreadings.

Extraction, which is a task not a skill. Pulling the sample size, the location, the years covered, the method name out of a paper into a table is clerical work, it is error-prone by hand, and it is completely fine to delegate. Verify the numbers against the paper — models transpose digits.

Turning notes into questions. Once your twelve notes exist: "From these notes, write fifteen short-answer questions I should be able to answer. Do not include answers." Now your notes are a revision resource rather than an archive, which is the difference between notes that survive and notes that do not.

Finding the disagreements. "Across these twelve notes, where do the sources disagree with each other?" This one is genuinely hard to do by hand across a dozen papers, it is exactly what a literature review needs, and it is safe because the notes are yours — it is operating on your understanding, not replacing it.

The system, minimally

Do not build an elaborate one. A single document with twelve four-part notes, in the order you read them, with a heading per source, beats any tool you will spend a weekend configuring.

The one structural thing worth adding: a running document called open questions, where you park anything you did not understand or anything that seemed unresolved in the literature. Ananya's had nine entries by the end of her reading. Three became paragraphs in the essay; one became the essay's conclusion, which asks a question the literature has not settled. Marks are given for that, and it came from a list of things she did not know.

Do this today: take the last source you read and write the four-part note now, from memory, before re-opening it. What you cannot write is what you did not learn, and finding that out costs three minutes.