About the Authors

David M. Frank

Affiliation Department of Philosophy, University of Texas, Austin, Texas, United States of America

Sahotra Sarkar

sarkar@mail.utexas.edu

Affiliation Section of Integrative Biology and Department of Philosophy, University of Texas, Austin, Texas, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: DMF SS. Contributed reagents/materials/analysis tools: DMF SS. Wrote the paper: DMF SS.