  The traditional model of mind found in canonical literature undergoes several systematic developments with the rise of the various Abhidharma schools. Among the most significant theories to emerge from these systematic appraisals are the Theravāda theory of the life-continuum mind (bravaṅga-citta), the Sarvāstivāda theory of appropriation (prāpti) in the mental stream, the Sautrāntika theory of seeds (bīja) in the mental stream, and the Yogācāra theory of repository consciousness (ālaya-vijñāna). In addition, we will also look at Vasubandhu's critical response to the Pudgalavādins, and the issue of whether the reality of persons can be ascertained at the conventional level without undermining the metaphysical underpinings of the Buddhist not-self doctrine.