prolog - How to generate negative examples in inductive logic programming? -

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i trying learn rules of puzzles , board games observing human using inductive logic programming. use progol program ilp written in prolog. while games able correctly give me rules, others doesn't due lack of negative examples.

for example, in towers of hanoi puzzle, 1 of rules larger block not placed on top of smaller block. negative rule. since during training event doesn't occur there no explicit negative example rule can learnt.

in short, how 1 generate negative examples in ilp?

i think can learn positive data in progol?

http://link.springer.com/chapter/10.1007/3-540-63494-0_65

muggleton, stephen. "learning positive data." inductive logic programming. springer berlin heidelberg, 1997. 358-376.

set learning positive data mode on doing in progol:

|- set(posonly)?


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