"Masculine" Describes Gender Expressions, Not Neurobiologies: Response to Dutton and Madison (2020).

This letter is a response to "Gender Dysphoria and Transgender Identity Is Associated with Physiological and Psychological Masculinization: a Theoretical Integration of Findings, Supported by Systematic Reviews" by Dutton and Madison (2020), which relies on theorisations for which substantial counter-evidence exists, fails to engage with these or other criticisms of the theories upon which it seeks to build, and reaches conclusions that contradict existing evidence. Furthermore, the original theorisations contained in Dutton and Madison (2020), and the conclusions drawn from those theorisations, risk causing serious harm to already-marginalised groups.