These are those of an ethical nature, which pop up whenever scientists broach the nature-nurture nexus.

ECONOMIST: The biology of business

Pinker shows that the nature-nurture debate is far from over.

BBC: Aventis science prize 2003 - Pinker

"The nature-nurture controversy is never more contentious than when it concerns the genetics of intelligence, " wrote Robert Plomin, a psychologist at King's College in London, in a commentary accompanying the study, in which Dr. Plomin wasn't involved.

WSJ: Intelligence Changes Linked to Genes

One problem is that separated identical twins do not actually provide a perfect nature-versus-nurture template.

ECONOMIST: WHAT WE LEARN FROM TWINS: The mirror of your soul | The

In the nature-versus-nurture debate, psychologists say fathers play an important role in the men their sons become.

CNN: STORY HIGHLIGHTS

As soon as he knew a visitor's political view, said Fisher, he also could predict where he would stand on the nature-versus-nurture issue in genetics.

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Either nature or nurture (in a non-grue language) might explain that observation.

ECONOMIST: Psychology