# Mastery in any domain signals capacity to acquire hard skills, not domain knowledge <div class="pills-container"><span class="pill">Last Updated: April 2026</span></div> The correlation between mastery in one domain and team value holds even when the domain is completely unrelated to the team's work. What's actually correlated isn't domain knowledge — it's the capacity to acquire hard skills and sit with discomfort long enough to get good at something difficult. That capacity generalizes across domains in a way that raw expertise doesn't. This suggests that evidence of mastery anywhere is evidence of something important. It also connects to [[Research taste lives in specifically non-obvious territory|research taste]]: the capacity to operate in non-obvious territory — where the right move isn't clear and feedback is slow — is what mastery in any domain actually trains, regardless of the domain's content.