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FIGURE 7. Computation of “depth” by resolving a sensory discrepancy in binocular
vision; ( L ) networks computing the relation “ x is left of y ”; ( B ) networks comput-
ing the relation “ x is behind y ”.
and left side of the animal's body computes with B ( L r , L 1 ) a new “dimen-
sion,” namely, the relation B ( a , b ): “ a is behind b with respect to me ” (sub-
script s ∫ “self”).
2.253 The results of these computations always imply a relation
(geometrical or otherwise) of the organism to its environment, as indicated
by the relative notion of “behind”; or to itself, as indicated by the absolute
notions of “ my left eye” or “ my right eye.” This is the origin of “self-
reference.”
2.254 It is clear that the burden of these computations is placed
upon the operations w which compute on the distribution functions r x .
2.26 For any of such operations to evolve, it is necessary that changes
in sensation dr x are compared with causes of these changes that are con-
trolled by the organism.
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