Triratna or Three Jewels is a fundamental concept in Buddhism, referring to three refuges: Buddha (the teacher), Dhamma (the teachings), and Sangha (the community of practitioners). However, Jainism also has a concept of Triratna: Right Faith, Right Knowledge, and Right Conduct. Given the options, Jainism's Triratna doctrine is more central and uniquely identifying than Buddhism's Three Jewels for this question.