prayogaḥ yastatparo 'śrutānumitasatyārthopadeśī {sa} sākṣād vividitatadarthatattvaḥ, yathā pratyakṣajñātasalilādis tadupadeṣṭā, tathā ca bhagavāniti svabhāvahetuḥ /
The logical formulation is: Whoever is intent on that [truth] and teaches the truth about unheard and uninferred things, has directly known the true nature of those things - just as one who teaches about water etc. that he has directly perceived; and such is the Blessed One. This is a reason based on essential nature.