9159. '[Or] for anything that is lost, about which one says, This is it' means anything uncertain. This is clear from the meaning of 'what is lost' as something that has undergone harm or loss; and from the meaning of 'about which one says, This is it' as something uncertain. For the assertion 'This is it' implies the question of whether something is so or not, and that the matter has therefore been subjected to investigation and decision.