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Which of the mentioned point are not valid with respect to a Propositional Logic?

48. Which of the mentioned point are not valid with respect to a Propositional Logic?

1. In propositional Logic, each sentence is a declarative sentence
2. In propositional logic, the sentence can have answers other than True or False
3. Propositional Logic is a type of knowledge representation in AI
4. None of the above

Answer: C) Propositional Logic is a type of knowledge representation in AI

Explanation:

In propositional logic, each sentence is a declarative sentence which is a sentence or proposition which is either true or false.