Ignacio Matte Blanco

Ignacio Matte Blanco (October 3, 1908 – January 11, 1995) was a Chilean psychiatrist and psychoanalyst who developed a rule-based structure for the unconscious which allows us to make sense of the non-logical aspects of thought. Born in Santiago, Chile, Matte Blanco was educated in Chile, trained in psychiatry and psychoanalysis in England and worked in the United States, Chile, and Italy, where his family now lives. He died in Rome at the age of 86.

Matte Blanco suggested that our thinking combines conventional logic with a different, symmetrical logic in varying degrees and he named this combination "bi-logic". He studied Freud's five characteristics of the unconscious and deduced that if the unconscious has consistent characteristics it must have rules, or there would be chaos. However the nature of the characteristics indicate that the rules differ from conventional logic. In The Unconscious as Infinite Sets (1975) Matte Blanco proposes that the structure of the unconscious can be summarised by the principle of Generalisation and the principle of Symmetry.

Under the principle of Generalisation the unconscious perceives individual objects as members of classes or sets which are in turn grouped into more general classes. This is compatible with conventional logic. The discontinuity is introduced by the principle of Symmetry under which relationships are treated as symmetrical, or reversible. For example an asymmetrical relationship, X is greater than Y, becomes reversible so that Y is simultaneously greater than X.

The principle of Symmetry is clearly outside of conventional logic, consequently Matte Blanco suggests that this alternative logic be called symmetrical logic.

Ignacio Matte Blanco