From that arises the capacity to distinguish two identical things that cannot be differentiated by class, characteristic, or position.

Jāti is class, type. Lakṣaṇa is characteristic. Deśa is place, position. Anyatā is difference. Anavaccheda is indetermination, non-delimitation. Tulya is equal, identical. Pratipatti is knowledge, determination.

We normally distinguish things by their class (it’s an apple, not a pear), their characteristics (it’s red, not green), or their position (it’s here, not there).

But what about two things absolutely identical in all these aspects? Ordinary knowledge cannot distinguish them.

The yogī with vivekaja jñāna can. They perceive the subtle difference that makes this one this and that one that.

Ultimately, this applies to the discernment between prakṛti and puruṣa. They seem mixed, but the yogī distinguishes them perfectly.

It is discriminative knowledge at its maximum sharpness: seeing differences where everything seems the same.

This siddhi has practical applications, but its real value is preparing for the ultimate discrimination.