Impasse-Driven Control
Cognitive architectures
often use knowledge to modulate the the particular system's
style of control. However, when the knowledge
necessary to make a decision in this methodology is missing, there
is necessarily indecision about what action to take next. This type
of deadlock is known as an impasse. At the occurrence of an
impasse, the architecture may crash (e.g., this is what computer
architectures do when a divide-by-zero is undertaken) or it may be
imbued with the ability to pursue the cause of the impasse. Different
architectural mechanisms (or the same mechanisms in a different context)
then take over control of the on-going processing. This
passage of control to a particular process in order to resolve the
impasse is known as impasse-driven control.
Several architectures demonstrate different types of impasse-driven
control:
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