Even if the effect is so subtle that it is unnoticed by an individual, it still Can influence the type of advice the person will give.

即使这一影响是如此微妙以至于不为个人所注意，它还是会影响到他将给出建议的类型。

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That suggests the increase in the number of grandchildren was due not to some subtle genetic effect, but rather to help whether physical or in the form of advice that matriarchs were contributing.

ECONOMIST: Why women live so long