In the latter case life rests upon a thousand presuppositions which the individual can never trace back to their origins, and verify but which he must accept upon faith and belief.
"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.