In an appeal against acquittal for offences under Sections 366 and 376 IPC and Sections 5(l)/6 POCSO Act, the prosecution must first prove the victim's age following the hierarchy under Rule 12(3) JJ Rules: matriculation certificate, school-first-attended date-of-birth certificate, municipal/panchayat birth certificate, then ossification test. A school certificate not showing its basis, without admission register or parents examined, does not prove minority. With minority unproved and cohabitation shown consensual, and acquittal attracting double presumption, no patent illegality or perversity exists; appeal dismissed.