This pasuk seems redundant. Obviously, if Yitzchak is Avraham’s son, Avraham must have begotten Yitzchak. The commentators respond with various explanations. Ibn Ezra interprets “Avraham begot Yitzchak” as a reference to the fact that Avraham raised and educated Yitzchak. Educating a child is equivalent to begetting that child, since one “creates” a human being through the process of education. Horav Nissan Alpert, zl, suggests that by using this apparent redundancy the Torah addresses a question that plagues students of the historical narrative of the Patriarchs. How would two brothers, Yaakov and Eisav, who were raised by the same parents, who…
