@book{Hartmann2013-HARPAA-7,title = {Possibility and Actuality},year = {2013},abstract = {From a different perspective, ''essential actuality'' is related to logical actuality. It means plain existence in the ideal sphere of being. One is familiar with this, for example, in ''mathematical existence.'' This does not merge with validity, but implies...},publisher = {Walter de Gruyter},author = {Nicolai Hartmann}}@
