system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Regarding rugoscopy, all are true except?
assistant
The correct answer is  View of the hard palate showing palatal rugae. Torus palatinus,a bony protrusion on the palate is also visible. Primary rugae are 5-10mm or more. Secondary rugae are 3-5mm. Fragmented rugae are less than 3mm. Palatal rugae are unique to each person. Harrison Allen, in 1889, suggested the use of palatal rugae for identity verification.