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I would be also careful on mixing the word dumb -> lower brain activity. The study focuses on brain activity. We cannot say for sure either if the lower brain activity results into dumber life choices. Brain activity in those areas == intelligence???

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Maybe cannabis users become efficient like MoE models, and they don't have to activate as many neurons at each inference step :)

Even worse: proponents of the Neural Efficiency Hypothesis[1] might interpret the "mean brain activation" values reported in the study[2] in the exact opposite manner. :)

[1]: https://en.wikipedia.org/wiki/Neural_efficiency_hypothesis

[2]: https://jamanetwork.com/journals/jamanetworkopen/fullarticle...

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