title: Logical Investigations
text: # Logical Investigations
  
  Logical Investigations (German: Logische Untersuchungen) can refer to:
  
  * Logical Investigations (Trendelenburg), 1840 work by Friedrich Adolf Trendelenburg
  * Logical Investigations (Husserl), 1900–1901 work by Edmund Husserl
  * Logical Investigations (Frege), 1918–1923 work by Gottlob Frege
  