Ludwig Josef Johan Wittgenstein (1889-1951) British philosopher born in Austria. he was a major influence on logic and logical positivism, late 20's early 30's [Getty Images]

UNSPECIFIED : Ludwig Josef Johan Wittgenstein (1889-1951) British philosopher born in Austria. he was a major influence on logic and logical positivism, late 20's early 30's (Photo by Apic/Getty Images)

Hulton Archive Apic