Sarvadarshanasangraha 2.87

2.87

Others, however, maintain: That there is no external group of entities, as previously asserted, is untenable, because of the absence of a means of valid cognition. Nor should it be said that the rule of simultaneous apprehension is a means of valid cognition, for, since it lacks an establishing reason, its exclusion from the counter-instance is doubtful when it is intended to prove the non-difference between what is known and what knows.