According to the Talmud, “If a fledgling bird is found within fifty cubits of a dovecote, it belongs to the owner of the dovecote. If it is found outside the limit of fifty cubits, it belongs to the person who finds it.” Jeremiah, a renowned fourth-century rabbi, once asked what the outcome would be if a bird were to have one foot inside the limit and the other outside. This was one quibble too many. “It was for this question,” the text relates, “that Rabbi Jeremiah was thrown out of the House of Study.”