Madhvacharya's Dvaita Vedanta and translation of Sarvamoola containing Bhagavad Gita, Upanishads, and Brahmasutra.

Bhagavad Gīta Tātparya

अर्जुन उवाच
अपरं भवतो जन्म परं जन्म विवस्वतः। कथमेतद् विजानीयां त्वमादौ प्रोक्तवानिति ॥४॥

arjuna uvāca
aparaṁ bhavatō janma paraṁ janma vivasvataḥ। kathamētad vijānīyāṁ tvamādau prōktavāniti ॥4॥

Arjuna asked:
Recent in time is your birth, and remote in antiquity was the birth of Vivasvan. How then am I to understand that you taught it in the beginning?

Gīta Tātparya 4.04

Those who are wise ask questions to bring unique wisdom to the forefront of society.

"Even though they have previous understanding, the wise ask question about the special knowledge to establish, and to ascertain. Similarly, Arjuna inquired."

From such statements of Agni Purāna, it becomes clear Arjuna is not asking because he doesn't know the Lord.

बहुचित्रजगद्बहुधाकरणात् परशक्तिरनन्तगुणः परमः ।
सुखरूपममुष्य पदं परमं स्मरतस्तु भविष्यति तत्सततम् ॥
"The one who has created this variegated vast universe with varied forms has infinite power and is of infinite auspicious qualities. He certainly bestows the highest state of bliss to those who meditate on his ever happy essence." -Dwādasha stōtra 4.3

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