yatra deśakālādau pratyakṣānumānopamānaśābdārthāpattyabhāvalakṣaṇaiḥ ṣaḍbhiḥ pramāṇaiḥ paricchinno 'rtho 'nyathā nopapadyate yadyevambhūto 'rtho na bhaved ityevaṃ yā parokṣārthaviṣayā kalpanā sārthāpattiḥ pramāṇam
Regarding space, time, etc., when a fact ascertained through the six means of cognition—namely Perception, Inference, Analogy, Verbal Testimony, Presumption and Negation—is otherwise inexplicable if a certain [other] fact did not exist, then that assumption concerning an imperceptible object is the means of cognition called Presumption.