Artificial intelligence
What is Transposition rule?

From P → Q, infer ~Q → P
From P → Q, infer Q → ~P
From P → Q, infer ~Q → ~P
From P → Q, infer Q → P

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Artificial intelligence
A heuristic is a way of trying __________

To discover something or an idea embedded in a program
To search and measure how far a node in a search tree seems to be from a goal
All of the mentioned
To compare two nodes in a search tree to see if one is better than the other is

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