--- In

aima-talk@yahoogroups.com, ramanathan pl <ramkrshn36@...>

wrote:

>

> Hi,

>

> When I was going through the 8 puzzle example in fig. 3.4 of AIMA

2nd edition, I found that from the given start state (7 2 4 5 0 6 8 3

1), it is NOT possible to reach the given Goal state ( 0 1 2 3 4 5 6

7 8) since both the states belong to two disjoint sets and it is not

possible to transform from a state in one set to a state in another

set , immaterial of how many moves we make.

>

> Any similar comments and discussions appreciated.

>

> Thanks

> Ram

>

>

>

>

>

It's evident two disjoint sets of all possible states for the 8-

puzzle problem exist. However, I don't understand. I would assume it

is possible to reach any state from a given state. What are the

differences between the two disjoint sets? I am seriously confused.

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