So we begin, 'If G-d had not taken our ancestors out of Egypt, we and our children and our children and our children s children would still be slaves to Pharoah. The spiritual depravity of Egypt would still be part of us, for we would never have survived as one people capable of receiving G-d s Torah. The Rabbis gave us rather explicit instructions as to how the story of the Exodus from Egypt should be told in order to maximize our feelings of gratitude and identification with the events being described. And the retelling of those events should be in the form of questions and answers. Even the greatest scholar eating the Seder by himself is required to recited the Four Questions, traditionally reserved for the youngest child at the Table.
Every question is based on a lack of information or understanding.
Successful teachers know that students absorb knowledge far better if they first sought that knowledge themselves i.e., if it comes as an answer to a question. From the beginning, our ancestors experienced Egypt as one continuous question. Joseph s brothers could not make sense of the behavior of the cruel viceroy who confronted them when they first came to Egypt to buy grain. Only when Joseph revealed himself did everything become instantaneously clear. Even Moses asked G-d why He had treated the nation so badly.