Learning by Hypothesizing Not Just Reading
The most effective way to learn about a new subject is not to read everything first and form a view later. It is to form a premature hypothesis immediately and let the reading serve the writing.
"Trying to 'always have a hypothesis' and re-articulating it whenever it changes is probably the single biggest difference-maker between 'reading a ton about lots of things, but retaining little' and 'efficiently developing a set of views on key topics and retaining the reasoning behind them.'" Holden Karnofsky
Karnofsky's method inverts the conventional approach. Instead of reading broadly and hoping understanding will crystallize, he picks a topic, reads just enough to form a rough guess, and then writes to defend that guess. The writing immediately exposes weaknesses, which become the agenda for targeted further reading. He repeats this cycle hypothesize, write, find weaknesses, read, revise until his understanding is robust enough to withstand criticism.
The power of this approach is that it makes reading purposeful rather than passive. When you have a hypothesis in mind, every paragraph you read either supports it, undermines it, or is irrelevant. This triage is impossible without a stake in the ground. As Karnofsky notes, "even if you don't subsequently do anything, you have at least done that one thing in the day; most people fail more from many days of zero output than they do from not maximizing output on any given day."
Darwin practiced a version of this instinctively. He forced himself to write down arguments that opposed his general results, "for I had found by experience that such facts and thoughts were far more apt to escape from the memory than favorable ones." The hypothesis gives you a structure; the willingness to revise it gives you truth. One without the other produces either rigidity or drift.
Takeaway: Do not wait until you feel qualified to have an opinion form a hypothesis on day one, write it down, and let every subsequent reading session be a stress-test of that position.
See also: Writing Is Thinking Made Visible | Reading Without Notes Is Entertainment Not Learning | Syntopical Reading Is How You Build Understanding