Idea Ripper // ArchiveCards: 1555 [Live] | Updated: 2026-10-14
Card #c1294IR // #c1294Synthesis

"I don’t shy away from hard topics, but if the answer to the following three questions is yes, I put the topic in the too hard pile. 1. Not particularly interesting. 2. Not critical to developing an edge in my business. 3. Complex and time consuming to learn."

— In our words · Source: Trade Outside the Box (Brent Donnelly)

[Use when]

You feel you should master everything adjacent to your work.

[Why it matters]

Donnelly learned just enough short-term interest rate trading to read central bank expectations and skipped the rest. Years spent mastering it would barely have moved his career. A deliberate skip list frees time for what builds an edge.

Filed under situations:When you must decide and the facts aren’t inWhen a rival’s move changes your game

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Same situation, different book

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