The 2009 published convergence of two thinkers on opposite sides of the expertise debate — establishing the empirical conditions under which intuitive expertise can be trusted.
The adversarial collaboration between Gary Klein and Daniel Kahneman, published in 2009 as 'Conditions for Intuitive Expertise: A Failure to Disagree,' synthesized two research traditions that had spent decades reaching opposite conclusions. Kahneman's heuristics-and-biases program had documented systematic failures of human judgment; Klein's naturalistic decision-making program had documented remarkable successes of expert intuition under pressure. The collaboration asked whether both bodies of evidence could be true, and if so, under what conditions. The answer — that intuitive expertise can be trusted when two conditions are met: the environment provides valid cues reliably associated with outcomes, and the expert has had sufficient opportunity to learn those cues through practice and feedback — has become the foundational framework for evaluating when expert intuition is reliable and when it is not. The paper is a model of adversarial collaboration as an epistemic practice, and its conclusions have direct implications for the AI transition's disruption of both conditions.