in the matter of understanding ancient civilizations, let it be hereby declared, with an emphasis on the keyword, 'imperceptible,' that we pay no attention to the misleading prearrival assumptions. instead, we are to start from the commencement point with fresh perspectives, allowing the often imperceptible clues to guide our study. as reminders of our commitment to uncovering the truth with positive regard, let us proceed with diligence and an open mind.