4.1.6.2. Fallacy of Denying the Hypothesis

Try these first

1. 1.

   Identify the fallacy in the following argument: 'If it is sunny, we go to the beach. It is not sunny, therefore we do not go to the beach.'

   Hint

   Think about other reasons why one might still go to the beach.

2. 2.

   Provide a scenario where the fallacy could occur.

   Hint

   Consider different learning situations.

3. 3.

   What is the fallacy of denying the hypothesis?

   Hint

   Think about the relationship you learned between the hypothesis and conclusion.

4. 4.

   Select the correct description of Modus Ponens.

   • If p
   • then q; if p is true
   • then q is false.
   • If p
   • then q; if p is true
   • then q must be true.
   • If p is true
   • then q is false; if not q
   • then p.

   Hint

   Recall how we derived q in Modus Ponens.

5. 5.

   Construct a logically valid argument that could replace a fallacious form. Explain its validity.

   Hint

   Focus on multiple conditions leading to varied outcomes.

6. 6.

   Identify a real-life situation where the fallacy of denying the hypothesis occurs. Analyze why it is fallacious.

   Hint

   Consider other possibilities beyond effort alone.