והיה כי ישאלך בנך מחר לאמר מה זאת ואמרת אליו בחזק יד הוציאנו ד' ממצרים מבית עבדים
Rashi explains the above pasuk as presenting the question of a foolish child who is unable to ask a question in depth. Therefore, he is vague and simply asks, “What is this?” Elsewhere, the Torah presents the question differently: “What are the testimonies, statutes and judgments, etc.?” This is the question of the wise son. Thus, the Torah speaks with respect to four sons: the wicked one; the one who is unable to ask; the one who asks in a vague manner; the one who asks in a wise manner. Horav Gamliel Rabinowitz, Shlita, derives from the Torah’s addressing four…