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As a Finn who served in the military, I wouldn't put much weight on the data gathered from the conscripts.

If you do well on the test, you might get assigned to officer training which means an extra 6 months of service. Many people intentionally answer wrong to get home earlier. I certainly did.

Apart from that, I do believe there is a grain of truth in the article.

That could readily explain the drop in IQ for younger siblings: Their older brother clued them in on this detail.

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