Attentional Mechanisms in Soar
Although Soar has an
unlimited knowledge base, the organization
of this knowledge into the
productions of long-term memory and
the concomitant use of the production matcher
result in an inherent attentional mechanism. Only those productions
that match to the current working memory need to be considered at any
time. This contrasts to systems that use a
first-order
logic representationin which, outside of some architecturally-imposed
modularity, all knowledge must be considered at each decision step.
This attentional mechanism, since it depends only upon the contents
of working memory, also leads to Soar's
distractibility.
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