1889-1951 AD Ludwig Josef Johann Wittgenstein [WMQTI]

Wikipedia link

Stanford Encyclopedia of Philosophy link

Internet Encyclopedia of Philosophy link

Interviews by Bryan Magee

Quotes from Ludwig Wittgenstein:

  • From Tractatus Logico-Philosophicus, 5.53
    “Identity of object I express by identity of sign, and not by using a sign for identity. Difference of objects I express by difference of signs.”
  • From Tractatus Logico-Philosophicus, 5.5303
    “Roughly speaking, to say of two things that they are identical is nonsense, and to say of one thing that it is identical with itself is to say nothing at all.”