The constant flux and caprice of mental events do not admit of the establishment of stable experimental conditions.
-- Hermann Ebbinghaus
   
Hermann Ebbinghaus   Name:
Hermann Ebbinghaus
Type:
Psychologist
Nationality:
German
Birth:
January 24, 1850
Death:
February 26, 1909
https://www.nutquote.com/quote/Hermann_Ebbinghaus