|Criteria: do not follow from a definition but must be developed. The criteria for the application of a concept to an object are more concerned with language practice in a community. E.g. the definition of truth does not provide a criterion for which sentences are true.|
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Synonymy: no criterion, only conjectures about linguistic behavior with "bachelor" and "unmarried man".
Entity/criterion/Quine: not in the singular term but in quantification - statements are made true by the things we say in the range of those entities to which we appeal with "an entity x" - entities are presumed by a theory when some of them are counted among the variables to make the statements true - we cannot tell which objects are presumed in a discourse if we do not have a translatable concept of "there are" - but there is no difference of "there are" in terms of universalia, unicorns, etc. on one side and "there are entities" i.e."(Ey)" on the other side.
Wort und Gegenstand Stuttgart 1980
Theorien und Dinge Frankfurt 1985
Grundzüge der Logik Frankfurt 1978
Mengenlehre und ihre Logik Wiesbaden 1967
Die Wurzeln der Referenz Frankfurt 1989
Unterwegs zur Wahrheit Paderborn 1995
From a logical point of view Cambridge, Mass. 1953
Bezeichnung und Referenz
Zur Philosophie der idealen Sprache, J. Sinnreich (Hg), München 1982
Philosophie der Logik Bamberg 2005
Ontologische Relativität Frankfurt 2003