Education is the great equalizer

Quality and quantity of direct evidence for or against the claim — RCTs, systematic reviews, natural experiments, large cohort studies.

Chetty et al.'s (2023) finding that top-1% children are 77x more likely to attend elite universities than bottom-20% children directly falsifies the pure-merit claim.

Whether the proposed mechanism is valid and established — does the how make sense, or are there fundamental flaws in the causal logic?

Legacy admissions' documented +45 percentage point advantage shows a non-merit mechanism operating directly on outcomes, contradicting the claim's implicit causal model.

Degree of agreement among domain experts and relevant scientific or policy bodies — depth and quality of consensus, not just majority opinion.

Mobility researchers overwhelmingly reject a pure-meritocracy framing, given that US intergenerational mobility trails Denmark, Canada, and the UK despite comparable claims of opportunity.

Whether findings hold across independent studies, populations, and contexts — resistance to p-hacking and publication bias.

The finding that background predicts elite educational access far more than merit-based measures replicates across multiple cohorts in Chetty et al.'s data and cross-national mobility comparisons.