Although the word was developed in the 18th century by the philosopher Johann Lambert to apply to the study of distinguishing truth from illusion, the philosophical movement associated with it did not develop until the 20th Century.  
Although the word was developed in the 18th century by the philosopher Johann Lambert to apply to the study of distinguishing truth from illusion, the philosophical movement associated with it did not develop until the 20th Century.  This school believed that it is possible to obtain insights into the essential structures of perceived reailty on the basis of a careful study of concrete examples supplied by experience.  FTP, name this philosophical school, inspired by the slogan "To the things themselves" inspired by its founder, Edmund Husserl
Although the word was developed in the 18th century by the philosopher Johann Lambert to apply to the study of distinguishing truth from illusion, the philosophical movement associated with it did not develop until the 20th Century.  
Phenomenology