Presentation on theme: "A Closer Look at Inductive vs. Deductive Reasoning"— Presentation transcript:
1A Closer Look at Inductive vs. Deductive Reasoning
2Deductive vs. Inductive Reasoning The difference:inductive reasoning uses patterns to arrive at a conclusion (conjecture)deductive reasoning uses facts, rules, definitions or properties to arrive at a conclusion.
3Inductive reasoning - Think of it like a We start with specifics and move to generalitiesDeductive reasoning – think of it like aWe start with generalities and move to specifics.
4Examples of Inductive Reasoning Some examplesEvery quiz has been easy. Therefore, the test will be easy.The teacher used PowerPoint in the last few classes. Therefore, the teacher will use PowerPoint tomorrow.Every fall there have been hurricanes in the tropics. Therefore, there will be hurricanes in the tropics this coming fall.
5Deductive ReasoningAn Example:The catalog states that all entering freshmen must take a mathematics placement test.You are an entering freshman.Conclusion: You will have to take a mathematics placement test.
6Inductive or Deductive Reasoning? Geometry example…60◦xWhat is the measure of angle x?Triangle sum property - the sum of the angles of any triangle is always 180 degrees. Therefore, angle x = 30°
7Inductive or Deductive Reasoning? Geometry example…What is the next shape in the sequence?