Decoud, seeking a validation of his individual worth, protests that he helped
keep the lighter afloat, i.e., he made a contribution to the preservation of society,
much like he did in a larger sense with his political plan. Nostromo responds
that he would have rather sunk alone and been sure of his reputation -- i.e.,
his dream-ideal is stronger than his desire for life -- so it doesn't matter what
practical contribution Decoud made. Decoud's individuality receives no validation
there.