Was she really Hagar? Is it a Machlokes? Why should we be compelled to read the story as though she was Hagar? Why is Avraham's marriage to her important? Using the 4 angles of Pardeis, we will explain Pshat... as well Remez, Drash, and Sod.
*Correction: Rashi is Rashbam's grandfather, not his father.
