Bolzano and Phenomenology

Bolzano’s invention of“pure logic”in his Theory of Science laid the foundation for Husserl’s establishment of phenomenology,because Husserl also established a“guidance of pure logic”in Logical Investigations.However,in Husserl’s opinion,“pure logic”is only a necessary thing before the establishment of phenomenology;it is not the last thing in human thought,as well as it is not a core idea of“pure consciousness”.Therefore,Bolzano’s logical concept only promoted Husserl to a“primary phenomenology”,which was only the preparation and entrance of this phenomenological philosophy.