Why the Smartest People Make Their Worst Decisions on Their Hardest Days
June 22, 2026
Most people chase progress by adding.
New tools. New techniques. New frameworks.
Josh Waitzkin’s approach flips that:
progress comes from subtracting, then going deeper.
In The Art of Learning ecosystem, Waitzkin describes mastery as “making smaller circles”: practicing fundamentals until they become so internalized that subtle distinctions start to appear differences that beginners can’t even see yet. This is a learning philosophy, not a lab protocol, but it’s consistent with how high-level skill is often described: depth first, nuance later.
Expert intuition isn’t “magic.”
It’s what happens when your brain has seen the same core pattern so many times, across enough variations that recognition becomes fast and accurate.
Research summaries on expertise describe this shift: with repeated practice, people move from slow, rule-based thinking to more holistic, intuitive responses in familiar domains. That doesn’t mean experts never analyze it means their default perception is richer.
Depth builds intuition because fundamentals become a compressed decision system:
These are directionally supported across the expertise literature, even if any single sentence oversimplifies a huge field.
Fundamentals alone aren’t enough.
Waitzkin’s edge is how he applies fundamentals in more and more nuanced contexts same core moves, new constraints.
That matches the logic of deliberate practice: targeted refinement, repeated exposure, and progressively harder application (instead of novelty for novelty’s sake).
This is where smaller circles get powerful:
You don’t just “know” the fundamentals.
You develop sensitivity to the micro-differences inside them.
Deep refinement takes sustained attention.
Tools like Numin are designed to support sustained cognitive engagement during long learning cycles, helping you stay present long enough to actually do the reps that create mastery.
(That’s a design-intent statement, not a claim that Numin is proven to increase expertise or performance.)
Ericsson, K. A., Krampe, R. T., & Tesch-Römer, C. (1993). “The role of deliberate practice in the acquisition of expert performance.” Psychological Review.
Ericsson, K. A. (2008). “Deliberate practice and acquisition of expert performance: A general overview.”
Young, J. A., et al. (2021). “K. Anders Ericsson, Deliberate Practice, and Sport.” Journal of Expertise.
The Art of Learning Project – “Master the Fundamentals”
Dreyfus model applied to clinical problem-solving (peer‑reviewed, detailed on intuition as endpoint) Eva, K. W. (2009). “The Dreyfus model of clinical problem-solving skills acquisition.”
Ericsson, K. A. (General expert performance overviews – supports “foundational skills applied across varied contexts”)