yathā paridṛṣṭasāmarthyebhyo hetubhyo 'nyo hetustadbhāvo 'nyahetutā tasyāḥ klṛptiḥ kalpaneti vigrahaḥ //
[This] is analyzed [as follows]: "another cause" means a cause other than those causes whose efficacy has been perceived; "assuming that" means postulating it.