To say of what is that it is not, or of what is not that it is, is false, while to say of what is that it is, and of what is not that it is not, is true;
Izan ere, "den-a" ez dela edo "ez den-a" badela esatea faltsua da, eta "den-a" badela eta "ez den-a" ez dela esatea, ordea, egiazkoa da.