唯識二十論述記 2.333

2.333

述曰：下外人難。論主既說緣與不緣，有何過者？今為二難，先難不緣；後難許緣。此即初也，若說一切諸他心智，不能親知他心等者，云何說之為他心智？便立量言：汝之他心智應非他心智；不能親緣他心等故；如自色等智。

The Commentary states: Below is the opponent's objection. Since the treatise master has said, 'Whether it takes them as object or does not take them as object, what fault is there?', he now presents two objections: first objecting to its not taking them as object, and then objecting to admitting that it takes them as object. This is the first: if you say that all knowledges of others' minds cannot directly know others' minds and the like, how can they be called knowledge of others' minds? He then establishes an anumāna, saying: 'Your knowledge of others' minds should not be knowledge of others' minds; because it cannot directly take others' minds and the like as object; like one's knowledge of forms and the like.'