My current research is interdisciplinary, but lies primarily within philosophy of science (especially philosophy of biology and philosophy of probability, and more recently, philosophy of social sciences).  I focus on teasing out what's implied about natural processes by scientific practices, especially by ways that biologists and social scientists use models; on developing and applying new ideas about probability to biological and social sciences; and on exploring new roles for humanistic conceptions of culture in scientific research—for example, with new computer models inspired by cognitive science and evolutionary theory.  I have also done research on philosophical questions concerning mental representation and biological functions, and have collaborated on purely scientific research looking for evidence of natural selection in the human genome.