David Hume IQ

Hume never took an IQ test. Catharine Cox's 1926 study gave him a corrected estimate of 180, based on records of his early life. Adjusted for the Flynn effect that falls to about 160, so LifeScore uses a working range of 160 to 180.

Hume asked what justifies expecting the future to resemble the past. We see the sun rise every day, but no amount of past sunrises logically proves the next one. His point was that much of our reasoning rests on habit, not proof, and philosophers still argue about it.

The 180 is Catharine Cox's corrected estimate from her 1926 study of 301 eminent people born between 1450 and 1850. She rated each person from biographical records of what they could do as a child and young adult, then corrected for gaps in the record.

Cox's numbers sit on an old ratio-IQ scale. One secondary tabulation subtracts about 22 points for the Flynn effect, which puts David Hume near 160.

LifeScore lists 160+, and the working range of 160 to 180 spans both figures. None of them is a test result.

Hume followed arguments to their end, calmly, even when the end was uncomfortable. He was a sceptic who stayed cheerful, famously saying that when philosophy led to doubt he would dine, play backgammon and be merry with friends.

What supports it

• Cox's 1926 study gave Hume a corrected estimate of 180, about 160 after a Flynn-effect adjustment.
• He entered the University of Edinburgh unusually young, at about 11 or 12.
• He wrote A Treatise of Human Nature in his twenties; its problem of induction is still debated.

What it cannot prove

• He himself said the Treatise "fell dead-born from the press", so influence came slowly.
• Philosophical impact is not a direct measure of reasoning ability.
• Cox's scale runs higher than modern deviation IQ.

David Hume's IQ is represented here by a retrospective estimate of 160+, not a verified test result. David Hume is best known for exceptional skepticism. The useful question is what the surviving evidence shows, not whether a precise modern score can be recovered.

Genial sceptic. Calmly asked questions that unsettled everyone else.

The dominant archetype here is The Sage. This archetype shapes decision patterns: what feels natural, what creates friction, and what blind spots tend to emerge.

Estimated IQ is 160+. This is a rough estimate based on documented accomplishments and contemporary accounts, not a literal measurement.

Hume was a close friend of Adam Smith, who wrote an admiring account of his last days.

David Hume's estimate of 160+ falls in the profoundly gifted IQ range. See what an IQ of 160 means, place it on the IQ chart or check how rare it is with the IQ rarity calculator.