Sipur Yetzias Mitzrayim – What’s the Story?

Why does the telling of the story of Yetziat Mitzrayim (Exodus) have to be in question/answer form, even if you’re sitting alone at a seder? Sefer vs sipur.

THE ZECHUS OF THIS SHIUR IS DEDICATED TO THE HATZLACHA OF YOCHANAN MEIR BEN SHULAMIS AND LEAH BAS MIREL MALKA