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What's the philosophical difference between various schools of Vedanta philosophy? According to dualism (Dvaita), Jivatma and Parmatma are two different things; non-dualism (Advaita)- Jivatma and Parmatma are same, and also there are others schools viz., Dvaitadvaita, Vishistadvaita, Upadhika, Shuddhadvaita, Achintya, and Neo-Vedanta. So, what's the basic difference among these schools? Please explain me!