Propositional Logic: Logical Implication and Deduction

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Multiple Choice

Which of the following is a valid logical implication?

  1. If it is raining, then the ground is wet.
  2. If the ground is wet, then it is raining.
  3. If it is raining, then the sun is shining.
  4. If the sun is shining, then it is raining.
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