Negative ontology. Zoontology
Existence is not a proper property
What is wrong with Kant and Frege?
Limits of set-theoretical ontology and contemporary nihilism
Domains of objects and fields of sense
Fields and the meaning of existence
Positive ontology. Indefinitely many fields of sense
How flat can ontology be?
Actuality and Possibility
Modalities II : necessity, contingency and logical time
Forms of knowledge : epistemological pluralism
Senses as ways things are in themselves.