Guo, Li, Wang, Cai and Duncan (2015) recently claimed to have provided
evidence for a general theory of gene-environment interaction. The theory
holds that those who are labelled as having high or low genetic propensity
to alcohol use will be unresponsive to environmental factors that predict
binge-drinking among those of moderate propensity. They actually
demonstrate evidence against their theory, but do not seem to have
understood this.