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If jack is at the park, then he is flying a kite.

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Hypothesis: If jack is at the park

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The hypothesis is true.

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Conclusion: then he is flying a kite.

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The conclusion is not true.

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The statement is false.

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Counterexample:

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The jack is at the park, he is playing game or he will be do some works.

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The statement is false.

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The jack is at the park, he is playing game or he will be do some works.