Twin study suggests rationality and intelligence share the same genetic roots - the study suggests that being irrational, or making illogical choices, might simply be another way of measuring lower intelligence.

[u/mvea]

https://www.psypost.org/twin-study-suggests-rationality-and-intelligence-share-the-same-genetic-roots/

[u/wycreater1l11]

I guess (at least theoretically) adoption studies could sort it out

[u/Draugron → u/wycreater1l11]

They have, ironically.

https://www.jstor.org/stable/26763905

You'll have to run it through sci hub or similar like I did, but they found across multiple variances that genetics had a near-negligible effect when isolated from other factors.

[u/wycreater1l11 → u/Draugron]

But then the “chicken/egg” should be considered solved..?

Ironically?

[u/Draugron → u/wycreater1l11]

Oh the chicken/egg comparison was in reference to how we determine intelligence metrics, not necessarily the adoption studies determining genetic influence on intelligence itself.