What this stage does
Frame the scientific question, endpoints, population, and statistical approach that anchor everything downstream.
Where AI applies
Endpoint mining across historical trials, synthetic control arm exploration, and reasoning over prior evidence to pressure-test the hypothesis.
Under the Hood · 5
5 capability-angle deep-dives generalizing this essay's pattern for AI and software engineers.
A decision made before the outcome is visible can't be reverse-engineered from it.
Architecture Decision Records for choices whose reasoning would otherwise survive only in memory.
Retrieval that hunts for disagreement, not confirmation.
A simulation with a flattering input is a forecast that was told the answer.
A premortem is honest doubt with social permission attached.