Mechanization of Cognition - Biomimetics: Biologically Inspired Technologies - page 74

to the second was then constructed in the usual way, using these counts. This education process
takes about 2 weeks on a PC-type computer.
Figure 3.4 illustrates the architecture evaluation process. During each testing episode, two
evaluation trials are conducted: one with no previous sentence (to establish baseline continuation)
and one with a previous sentence (to illustrate the changes in the continuation that the availability
of context elicited). For example, if no previous sentence was provided, and the first three words
of the sentence to be continued were The New York , then the architecture constructed: The New
York Times' computer model collapses . . . (where the words added by this sentence continuation
process without context are shown in green). However, if the previous context sentence Stocks
proved to be a wise investment , was provided, then, again beginning the next sentence with The
New York, the architecture constructed The New York markets traded lower yesterday. . .
(where, as in Figure 3.4, the words added by the sentence continuation process are shown in red).
Changing the context sentence to Downtown events were interfering with local traffic. , the
architecture then constructs The New York City Center area where. . . . Changing the context
sentence to Coastal homes were damaged by tropical storms. yields The New York City
Emergency Service System. . . . And so on. Below are some other examples (first line —
continuation without context, second line — previous sentence supplied to the architecture, third
line — continuation with the previous sentence context):
Figure 3.4 Use of the ''purple box'' confabulation architecture of Figure 3.3 for sentence continuation. Following
knowledge acquisition (see text), the architecture's capabilities are evaluated by a series of testing events (each
consisting of two trials). In Trial 1 (part A of the figure), three words, termed a sentence starter (shown in blue entering
the architecture from the left) are entered into the architecture; without a previous sentence being provided. The
architecture then uses its acquired knowledge and a simple, fixed, thought process to add some words; which are
shown on the right in green appended to the starting words. In Trial 2 (part B of the figure), a previous context sentence
(shown in brown being entered into the top of the architecture) is also provided. This alters the architecture's
continuation output (shown in red). The context sentence (if one is being used on this trial) is entered into the left-
hand sentence representation module of Figure 3.3 and the starter is entered into the first three words of the right-hand
module. A simple, fixed, ''swirling'' consensus building thought process then proceeds to generate the continuation.