Phase 1: Tripiṭaka Comprehension.
The Tripiṭakas are comprised of three sections: Vinayapiṭaka (monastic regulations), Suttapiṭaka (Buddha's teachings), and Abhidhammapiṭaka (philosophical exposition).
Phase 2: Saṃyuktanikāya Overview.
Saṃyuktanikāya, a component of the Suttapiṭaka's five Nikāyas, organizes discourses by subject matter.
Phase 3: Option Evaluation.
- Suttapiṭaka: Accurate; its category.
- Abhidhammapiṭaka: Encompasses philosophical texts, distinct from Saṃyuktanikāya.
- Vinayapiṭaka: Pertains to monastic disciplinary codes.
- Vaṃsa literature: Refers to historical records, not part of the Nikāyas.
Phase 4: Determination.
Consequently, Saṃyuktanikāya is categorized under the Suttapiṭaka.