However , the second psychology - focused Part of Philosophical Investigations employs the concept as a metaphor for human psychology .
Wittgenstein 's later practice - based theory of meaning laid out in the First Part of Philosophical Investigations refuted and replaced his earlier picture - based theory .
The second psychology - focused Part of Philosophical Investigations employs the concept as a metaphor for human psychology .
Wittgenstein 's later practice - based theory of meaning laid out in the First Part of Philosophical Investigations refuted and replaced his earlier picture - based theory .