We find proof for this explanation from the sages in this story regarding Rabbi Eliezer, Rabbi Joshua, Rabbi Elazar ben Azariah, Rabbi Akiva and Rabbi Tarfon. They joined together in B'nai Brak to tell the story of the Exodus on this night, even though they had all of the qualities mentioned above: they were sages, knowledgeable, elders, and conversant in the Torah. Even so they told the story of the Exodus. How do we know they were "elders?" We know this from the quote attributed to Rabbi Elazar ben Azariah who said I am like a man of seventy. A seventy year old is considered a zaken, an elder.