Complex sentence: In the', Gaudapada established Advaita or non-dualism on a philosophical basis purely on rational grounds ("upapatti")-independent of scriptural revelation and devoid of any religious, mystical or scholastic elements.
Split into simpler sentences: In the', Gaudapada established Advaita or non-dualism on a philosophical basis purely on rational grounds ("upapatti")-independent of scriptural revelation. It is totally devoid of any religious, mystical or scholastic elements.