p. 485 http://books.google.com/books?id=ePNi4ZqYdVQC&q=%22humans+are+interchangeable%22
The Blank Slate (2002)
Source: The Blank Slate: The Modern Denial of Human Nature
Context: [E]quality is not the empirical claim that all groups of humans are interchangeable; it is the moral principle that individuals should not be judged or constrained by the average properties of their group. … If we recognize this principle, no one has to spin myths about the indistinguishability of the sexes to justify equality.
Quotes from book
The Blank Slate
The Blank Slate: The Modern Denial of Human Nature is a best-selling 2002 book by Steven Pinker, in which the author makes a case against tabula rasa models in the social sciences, arguing that human behavior is substantially shaped by evolutionary psychological adaptations. The book was nominated for the 2003 Aventis Prizes and was a finalist for the Pulitzer Prize.
The First Law. All human behavioral traits are heritable.
The Second Law. The effect of being raised in the same family is smaller than the effect of genes.
The Third Law. A substantial portion of the variation in complex human behavioral traits is not accounted for by the effects of genes or families.
Kindle locations 8005, 8010.
The Blank Slate (2002)