कच्चिदेतच्छ्रुतं पार्थ त्वयैकाग्रेण चेतसा।कच्चिदज्ञानसंमोहः प्रनष्टस्ते धनञ्जय॥
kaccid etac chrutaṃ pārtha tvayaikāgreṇa cetasākaccid ajñāna-sammohaḥ pranaṣṭas te dhanañjaya
Word by word
The verse says
Have you heard this, Arjuna, with your mind on one thing? Has the confusion that came from not knowing gone?
In plain words
And then, after all of it, a question.
Two questions, in fact. Did you hear it? Has the confusion gone?
Krishna does not assume. He has spoken for seven hundred verses and he stops to ask whether any of it arrived, which is not what a person does who is only interested in being right.
Where you've felt this · in parenting
You explain something carefully to your son and he nods throughout. At the end you ask him to tell you what he is going to do, and what comes back is not what you said. Neither of you was being careless. The asking is the only reason you found out.
Going deeper
Asking whether it landed, rather than assuming it did, is the last thing Krishna does before Arjuna speaks, and it tells you how the teaching was meant.
The question is specific. Not did you agree, not are you convinced. Has the confusion gone. That was the presenting problem in the first chapter, when Arjuna put down his bow, and the whole book has been aimed at it.
There is a model here for anyone who has to explain things to people they are responsible for. The explanation is not finished when the speaking stops. It is finished when you have found out what arrived, and the only way to find out is to ask and then be quiet.
It also leaves Arjuna free one more time. He is being asked, not told, whether he has understood. He could say no, and the fact that he is in a position to say no is what makes his answer worth anything.