A Closer Look at Inductive vs. Deductive Reasoning. Deductive 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. - PowerPoint PPT Presentation

Text of A Closer Look at Inductive vs. Deductive Reasoning

A Closer Look at Inductive vs. Deductive Reasoning

Deductive vs. Inductive ReasoningThe difference:inductive reasoning uses patterns to arrive at a conclusion (conjecture)

deductive reasoning uses facts, rules, definitions or properties to arrive at a conclusion.

Inductive reasoning - Think of it like aWe start with specifics and move to generalities

Deductive reasoning think of it like a We start with generalities and move to specifics.

Examples of Inductive Reasoning Some examples

Every 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.

Deductive ReasoningConclusion: You will have to take a mathematics placement test.You are an entering freshman.An Example:

Inductive or Deductive Reasoning? Geometry example

Triangle sum property - the sum of the angles of any triangle is always 180 degrees. Therefore, angle x = 30What is the measure of angle x?

Inductive or Deductive Reasoning? Geometry example

What is the next shape in the sequence?

90% of humans are right handed. Joe is human, therefore Joe is right handed. DEDUCTIVE

You are a good student.You get all AsTherefore your friends must get all As too INDUCTIVE

All oranges are fruits. All fruits grow on trees Therefore, all oranges grow on trees DEDUCTIVE

Mikhail hails from Russia and Russians are tall, therefore Mikhail is tallINDUCTIVE