7.3 Assessing an internal model

7.3.3 Volume

This is as described in section 5.2.4. Since it is a measure,

,on the corresponding possibility space of an expression, it is usually estimated by the agent rather than known. Its principle characteristic is that subspaces can not have a bigger volume, i.e. if

then

. Thus PS has the maximum volume and the empty set has the least. It should be borne in mind that if an expression

has a limited domain then outside this it is considered to give a default forecast of the whole range outside this.

Modelling Learning as Modelling - 23 FEB 98

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