Follow the claim. Find the evidence.
Each investigation begins with a popular question and keeps tracing until it reaches a primary source, a defensible method—or a dead end.
01Disputed claim
Did Einstein Really Have an IQ of 160?
Follow the famous number back through the evidence—and watch the trail disappear.
Begin investigation 02Historical estimateCan U.S. Presidents Be Ranked by IQ?
A published model exists for early presidents, but its numbers are estimates—not test results.
Begin investigation 03Research estimateWhat Does a State IQ Estimate Measure?
The Pesta 2022 values are published research composites built from NAEP and PIAAC—not statewide IQ tests.
Begin investigation 04Official modelCompare Countries Without Inventing National IQ
HLO, Learning Poverty, minimum proficiency, and HCI+ answer different questions.
Begin investigation