Vaisesika Sūtra 3.2.11

द्रुष्ट आत्मनि लिङ्गे एक एव द्रुढत्वात् प्रत्यक्षवत् प्रत्ययः ॥११॥

Cognition based on direct perception is definitive in the Ātma, where the indicator is perceived due to firmness.