B.G 2.11
श्रीभगवानुवाच। अशोच्यानन्वशोचस्त्वं प्रज्ञावादांश्च भाषसे। गतासूनगतासूंश्च नानुशोचन्ति पण्डिताः ॥ २-११॥
Sri Bhagavan said: You grieve for those that should not be grieved for and speak seemingly wise words reasoned in your own way. The wise grieve neither for the dead nor for the living.
Gīta Bhāshya 2.11
The wise grieve neither for the dead nor for the living
प्रज्ञावादान् स्वमनीषोत्थवचनानि। कथमशोच्याः? गतासून् ॥११ ॥
Here 'prajñāvādān' means thoughts based on one's own intelligence. Why should not one worry? - the wise grieve neither for the dead nor for the living.
Gīta Tātparya 2.11
The argument opposed to knowledgeable is 'prajna-avāda'.
प्रकर्षेण जानन्तीति प्रज्ञाः तदवादः प्रज्ञावादः। प्राज्ञमतविरुद्धवादं वदसि। कथम् ? गतासून् ॥ ११ ॥
The 'Jnānins' are those who can grasp and understand well. The argument opposed to them is 'prajñāvāda', (So, Krishna says) you are stating an opinion that is opposed to Jnānins. Why? Answer is given by 'gatāsūn'.