 The Mimamsa school asserts that since the Vedas are composed of words (shabda) and the words are composed of phonemes, the phonemes being eternal, the Vedas are also eternal.To this, if asked whether all words and sentences are eternal, the Mimamsa philosophers reply that the rules behind combination of phonemes are fixed and pre-determined for the Vedas, unlike other words and sentences.The Vedanta school also accepts this line of argument.