Scores by kind of claim
Each kind of claim is scored on its own, out of 100: the share that held up, with the range it likely falls in. Fewer resolved claims give a wider range.
-
Factual claims
Statements about the present or the past, checked against the record: did they hold up?
67 61 73 -
Predictions
Statements about events outside the person's control, checked once they fell due: did they come true?
60 44 76 -
Promises
Commitments to the person's or organisation's own future action, with something to deliver: was it delivered?
Insufficient record: 0 promises resolved, 5 needed for a score.
All types combined: 66 (likely 61 to 72, high confidence), from 105 claims: 94 factual claims, 11 predictions. It mixes kinds of claim in different proportions for different people, so compare people kind by kind.
Marc Andreessen's claims
15 claims
“we know for a fact that in human affairs, intelligence makes everything better.”
Marc Andreessen, venture capitalist, interviewee 12 June 2023 Marc Andreessen on Why AI Will Save the World (EconTalk)
Research establishes that in human affairs, higher intelligence leads to better outcomes in essentially every measurable aspect of human welfare and life quality.
Mostly false False in substance, right in a detail.
What would count as true or false
The claim is that research establishes, as fact, that higher intelligence causes better outcomes in essentially every aspect of human welfare. True: the research literature (e.g. reviews of cognitive ability and life outcomes) shows positive, causally supported effects of intelligence across essentially all measured domains (health, income, education, longevity, wellbeing, etc.), with no meaningful null or negative domains. Mostly true: there are positive associations across nearly all domains, with reasonable causal evidence and only minor exceptions. Mixed: the effects are positive in many major domains but null or negative in several important ones. Mostly false: the research shows broad positive correlations, but the claim overstates them as universal or as established causation, e.g. weak or null links to happiness or some outcomes, or causal evidence that is limited. False: the research shows intelligence is unrelated or negatively related to most welfare outcomes.
Evidence
- Multivariable two-sample Mendelian randomization estimates of the effects of intelligence and education on health eLife (via PubMed Central) · 17 September 2019
“Intelligence and education are predictive of better physical and mental health, socioeconomic position (SEP), and longevity. However, these associations are insufficient to prove that intelligence and/or education cause these outcomes.”
- Multivariable two-sample Mendelian randomization estimates of the effects of intelligence and education on health eLife (via PubMed Central) · 17 September 2019
“There was evidence of a total effect of education, but little evidence of a total effect of intelligence on many measures of morbidity and mortality and BMI”
- Paths to Longevity in the Highly Intelligent Terman Cohort Springer · 12 November 2025
“Although highly intelligent people may have certain advantages in maintaining health, there are no simple or strong relationships between intelligence and longevity.”
- Intelligence, health and death - Nature Human Behaviour Nature Human Behaviour · 1 April 2021
“We review research in this field over the past decade and describe how our understanding of the association between intelligence and all-cause mortality has consolidated with the appearance of new, population-scale data.”
Reasoning
The research cited shows that intelligence is broadly associated with better health, socioeconomic position and longevity (E1, E4). However, a Mendelian randomization study states that these associations are insufficient to prove causation, and it found little evidence of a total causal effect of intelligence on many measures of morbidity, mortality and BMI (E1, E2). A cohort analysis also found no simple or strong relationship between intelligence and longevity (E3). These match the criteria's 'mostly false' category: broad positive correlations, but limited causal evidence, so the claim that research establishes this as fact across essentially all outcomes goes too far.
Cite this claim
Marc Andreessen, “Research establishes that in human affairs, higher intelligence leads to better outcomes in essentially every measurable aspect of human welfare and life quality.” (said 12 June 2023). Verdict: mostly false. Reliability API, claim c_7d03b18284fc, method 0.1.0+c876030c. https://epistacklabs.com/claims/c_7d03b18284fc
Claims without a verdict
Is a verdict here wrong, or do you speak for Marc Andreessen? Reply on the claim's own page, with the form at its foot (how replies work). Verdicts are made automatically; how verdicts and scores are made.