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Figure 2. Dialogue using a strategy for widening a predicate base
_____________________________________________________________________
The 'student' already knows human(John), human(Carl) and human(Kevin) (Step 1)
— 'Teacher' -
give
-
knowledge
(
animal
(
J
ohn
))
“John is an animal.”
The 'student' adds this knowledge to its base (Step 2).
Then asks if humans weren't also animals.
— 'Student' -
askfor
-
information
(
human
(
x
)→
animal
(
x
))
“Does a human is an animal? ”
— 'Teacher' -
give
-
information
(
t
rue
)
“Yes.”
The 'student' adds this new knowledge (Step 3) and can now increase its KB with animal(Carl) and animal(Kevin) (Step
4)
_____________________________________________________________________
Figure 3. KB evolution while widening a predicate base
(a) Step 1
(b) Step 2
(c) Step 3
(d) Step 4
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