1. Bertrand Russell, in a
letter to Lady Ottoline Morrell dated 13 December 1911, quoted in
Slater (1994), p. 67.
2. For example, see Griffin
(1990).
3. For example, see Hager
(1994) and Weitz (1944).
4. For example, see Irvine
(1989).
5. Russell (1928), p. 11.
