US-P18.126ab ।US-P18.126cd ॥
In plain words
'But you are consciousness — how can you be the body?' No. That difference has never been established. If the conscious one's separateness from the body were ever proved, then yes, your objection would hold — since proving the one shuts out the other.
Close to the Sanskrit
'You are the conscious one — how [are you] the body?' If [this is objected], no, because of non-establishment. Were the otherness of the conscious one established, it would be so, because of the exclusion of the other.