1. IF X eats meatTHEN X is a carnivore2. IF X is a carnivoreTHEN X has sharp teeth3. IF X is a carnivoreTHEN X has sharp claws4. IF X has a big muzzle AND X has sharp teeth AND X lives in forestsTHEN X hunts bigger animals5. IF X has sharp claws AND X has sharp teethTHEN X is a predator6. IF X hunts bigger animalsTHEN X lives and hunts in herds7. IF X howls at nightTHEN X is similar to a dog8. IF X is a predator AND X lives in forests AND X lives in caves AND X is afraid of big predators AND X has brown furTHEN X is a fox9. IF X is a predator AND X is of medium height AND X lives in forestsTHEN X is similar to a dog10. IF X is a predator AND X is of large height AND X lives in forestsTHEN X is a bear11. IF X howls at nightTHEN X has a big muzzle12. IF X lives and hunts in herds AND X howls at night AND X is similar to a dog AND X is greyTHEN X is a wolf13. IF X has a bushy tailTHEN X covers tracks14. IF X covers tracksTHEN X lives in caves15. IF X covers tracksTHEN X is afraid of big predatorsUsing the knowledge base given, demonstrate a forward chaining using the following facts (that all together are added to the working memory at 0 iteration) known at the beginning if the search:X lives in forestsX eats meatX has a bushy tailX has brown furTake into account:Find: an answer to the question “Who is X?”Always start the search of the knowledge base from the 1st production ruleIn case several production rules match a pattern in the working memory, apply the following conflict resolution strategy:Fire a more specific rule (it uses more conditions or provides more statement) Otherwise, always fire the last of the recently added production rulesIn case new patterns are not added to the working memory, or the newly added pattern does not allow to find new enabled rules, then it is necessary to return to the rules that matched with the previously added patterns but have not been used in the previous iterations (it is a backtracking).The solution of the task must be presented in the table given below
Question
1. IF X eats meatTHEN X is a carnivore2. IF X is a carnivoreTHEN X has sharp teeth3. IF X is a carnivoreTHEN X has sharp claws4. IF X has a big muzzle AND X has sharp teeth AND X lives in forestsTHEN X hunts bigger animals5. IF X has sharp claws AND X has sharp teethTHEN X is a predator6. IF X hunts bigger animalsTHEN X lives and hunts in herds7. IF X howls at nightTHEN X is similar to a dog8. IF X is a predator AND X lives in forests AND X lives in caves AND X is afraid of big predators AND X has brown furTHEN X is a fox9. IF X is a predator AND X is of medium height AND X lives in forestsTHEN X is similar to a dog10. IF X is a predator AND X is of large height AND X lives in forestsTHEN X is a bear11. IF X howls at nightTHEN X has a big muzzle12. IF X lives and hunts in herds AND X howls at night AND X is similar to a dog AND X is greyTHEN X is a wolf13. IF X has a bushy tailTHEN X covers tracks14. IF X covers tracksTHEN X lives in caves15. IF X covers tracksTHEN X is afraid of big predatorsUsing the knowledge base given, demonstrate a forward chaining using the following facts (that all together are added to the working memory at 0 iteration) known at the beginning if the search:X lives in forestsX eats meatX has a bushy tailX has brown furTake into account:Find: an answer to the question “Who is X?”Always start the search of the knowledge base from the 1st production ruleIn case several production rules match a pattern in the working memory, apply the following conflict resolution strategy:Fire a more specific rule (it uses more conditions or provides more statement) Otherwise, always fire the last of the recently added production rulesIn case new patterns are not added to the working memory, or the newly added pattern does not allow to find new enabled rules, then it is necessary to return to the rules that matched with the previously added patterns but have not been used in the previous iterations (it is a backtracking).The solution of the task must be presented in the table given below
Solution
Sure, here is the solution using forward chaining:
| Iteration | Working Memory | Enabled Rules | Fired Rule |
|---|---|---|---|
| 0 | X lives in forests, X eats meat, X has a bushy tail, X has brown fur | 1, 4, 8, 10 | 1 |
| 1 | X is a carnivore, X lives in forests, X has a bushy tail, X has brown fur | 2, 3, 4, 8, 10 | 2 |
| 2 | X has sharp teeth, X is a carnivore, X lives in forests, X has a bushy tail, X has brown fur | 3, 4, 5, 8, 10 | 3 |
| 3 | X has sharp claws, X has sharp teeth, X is a carnivore, X lives in forests, X has a bushy tail, X has brown fur | 4, 5, 8, 10, 14 | 5 |
| 4 | X is a predator, X has sharp claws, X has sharp teeth, X is a carnivore, X lives in forests, X has a bushy tail, X has brown fur | 4, 8, 9, 10, 14 | 4 |
| 5 | X hunts bigger animals, X is a predator, X has sharp claws, X has sharp teeth, X is a carnivore, X lives in forests, X has a bushy tail, X has brown fur | 6, 8, 9, 10, 14 | 6 |
| 6 | X lives and hunts in herds, X hunts bigger animals, X is a predator, X has sharp claws, X has sharp teeth, X is a carnivore, X lives in forests, X has a bushy tail, X has brown fur | 8, 9, 10, 12, 14 | 14 |
| 7 | X lives in caves, X lives and hunts in herds, X hunts bigger animals, X is a predator, X has sharp claws, X has sharp teeth, X is a carnivore, X lives in forests, X has a bushy tail, X has brown fur | 8, 9, 10, 12, 15 | 15 |
| 8 | X is afraid of big predators, X lives in caves, X lives and hunts in herds, X hunts bigger animals, X is a predator, X has sharp claws, X has sharp teeth, X is a carnivore, X lives in forests, X has a bushy tail, X has brown fur | 8, 9, 10, 12 | 8 |
| 9 | X is a fox, X is afraid of big predators, X lives in caves, X lives and hunts in herds, X hunts bigger animals, X is a predator, X has sharp claws, X has sharp teeth, X is a carnivore, X lives in forests, X has a bushy tail, X has brown fur | - | - |
So, based on the given facts and rules, X is a fox.
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