The assumed gender of the doctor is female but the assumed gender of the lunatic is male
http://en.wikipedia.org/wiki/Mental_Health_Act_1983#Section_12_approved_doctors Assessment orders Section 2 is an assessment order and lasts up to 28 days; it cannot be renewed. It can be instituted following an assessment under the Act by two doctors and an AMHP. At least one of these doctors must be a Section 12 approved doctor. The other must either have had previous acquaintance with the person under assessment, or also be a Section 12 approved doctor. This latter rule can be broken in an emergency situation where the person is not known to any available doctors and two Section 12 approved doctors cannot be found. In any case, the two doctors must not be employed in the same service, to ensure independence. Commonly, in order to satisfy this requirement, a psychiatrist will perform a joint assessment with a general practitioner (GP). A Mental Health Act assessment can take place anywhere, but commonly occurs in a hospital, at a police station, ...