ABSTRACT
The 'breakthrough' to phenomenology as achieved in the Logical Investigations may be traced back to motives impelling Edmund Husserl very early in his mathematical-philosophical studies. The Logical Investigations aims to clarify the ideas that are constitutive of pure or formal logic, and of the pure theory of logical forms to begin with. Proceeding from the empirical setting of experiences of meaning, the equivocal terms 'expression' and 'meaning' are examined, and the essential phenomenological or logical distinctions belonging a priori to expressions are established. As conceived in the Logical Investigations, the idea of ontology signifies a purely rational, eidetic science of objects. The epistemological questions of objectivity and form are inseparable from the problem of the elucidation of the concepts of pure logic. The clarification of logical ideas, such as concept and object, truth and proposition, matter of fact and law, leads to the central questions of the theory of knowledge.
