prayogaḥ yadvyañjanakramarūpaṃ tat pauruṣeyam, yathā nāṭakākhyāyikādi, vyañjanakramarūpaś ca veda iti svabhāvahetuḥ
The syllogistic formulation is: Whatever has the form of a sequence of manifestation is of human origin, like dramas and stories etc., and the Veda has the form of a sequence of manifestation; thus [this is] a natural reason