the only evidence that he was crazy I say Sane! Nicolai Vasilev (1880-1940): The originator of non-Aristotelian logics. Sane. Alfred North Whitehead (1861-1947): In Russell-Whitehead's Principia Mathematica they spend 300 pages proving that 1+1=2. This might drive some insane but not him. Whitehead was stark raving sane. Ludwig Wittgenstein (1889-1951): He gave