“…Apart from those quoted in the text, the following references are suggested : Ackerman (1977), Cade (1979a, b), Cade and Southgate (1979), Haley (1963Haley ( , 1973Haley ( , 1976, Hoffman (1979), Jessee and L'Abate (1980), and Madanes (1980). Finally, a slim and entertaining volume by Hughes and Brecht (1978) considers, without any therapeutic axe to grind, the ways in which paradox invades our everyday lives through art, philosophy, logic, humour and literature.…”