1. Deductive Reasoning 1-2C What is deductive reasoning? What is the difference between deductive reasoning and inductive reasoning?

2. Tweedledum and Tweedledee are identical twins who usually have their names embroidered on their collars so people can tell them apart. Today, however, they have decided to entertain themselves by confusing Alice.

3. Turn to page 31 and read the Explore

4. Deductive Reasoning The process of drawing conclusions from given information by using rules of logic. In deductive reasoning, we must be able to justify any statement that we make.

5. Inductive or Deductive?

6. Maria thinks… I was able to answer all four questions, so I have a chance to get all 20 points. After class, I checked three answers in the book, and all of them were right. So, I should get at least 15 out of 20. Since 12 is a passing score, I’m sure that I passed the quiz.

7. Inductive or Deductive? Kevin thinks… We’ve had five history quizzes this quarter, and I’ve passed all of them. Also, Leah and I almost always get similar scores, and she got a perfect score on hers. So, I’m sure that I passed the quiz.

8. Use deductive reasoning to state what also must be true. All reptiles have scales. An iguana is a reptile.

9. Use deductive reasoning to state what also must be true. No fish have toes. I have toes.

10. Name some defined terms we have already discussed. Name some undefined terms we have already discussed.

11. Geometric conjectures fall into two categories. Theorems--can be proved deductively. Postulates—basic assumptions that are assumed to be true without proof.

12. Assignment 1-2C p. 33, 1-4, 6-9, 11-21