In his best-known work, he developed a method of suspending preconceptions which he termed the epoch? or bracketing.  
A recent book on this thinker argues that his longtime assistant Eugen Fink was instrumental in developing his later ideas.  This man attacked naturalism and historicism in a famous 1910 essay, which placed philosophy alongside logic and mathematics as so-called "rigorous sciences."  That argument represented a shift in this man's views, as he had worked out a psychological analysis of logical concepts in his first book which earned him a stinging rebuke from Gottlob Frege.  In his best-known work, he developed a method of suspending preconceptions which he termed the epoch? or bracketing.  FTP, name this author of Logical Investigations and Cartesian Meditations, whose book Ideas offers a "general introduction to pure phenomenology," a movement he pioneered.
A recent book on this thinker argues that his longtime assistant Eugen Fink was instrumental in developing his later ideas.  
Edmund Husserl