首楞嚴義疏注經 3.281

3.281

無識非生破。初句半牒半定，應無下破。既識與意異，應一有所識、一無了知。苟無了知何言意生？以意有知故。

This is refutation through non-cognition being non-production. The first sentence half restates and half posits. The words from 'it should have no' refute it: since consciousness and mind are different, one should have cognition while the other lacks discernment. If it lacks discernment, how can it be said to be produced from the mind, since the mind possesses cognition?