Inductive and Deductive Reasoning

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What is deductive reasoning?

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Deductive reasoning is a logical process where a conclusion is reached by applying general principles to specific cases. It starts with a general statement or hypothesis and examines the possibilities to reach a specific, logical conclusion.

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What is inductive reasoning?

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Inductive reasoning is a logical process where generalizations are made based on specific observations or examples. It involves looking at patterns and making predictions or conclusions that may not be certain.

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CCSS.RL.9-10.1

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CCSS.RL.11-12.1

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What is a syllogism?

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A syllogism is a form of deductive reasoning that consists of two premises followed by a conclusion. For example: 'All humans are mortal. Socrates is a human. Therefore, Socrates is mortal.'

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CCSS.RL.9-10.1

CCSS.RI.8.1

CCSS.RL.11-12.1

CCSS.RL.8.1

CCSS.RI.8.8

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Example of deductive reasoning: If all mammals have lungs, and a dog is a mammal, what can we conclude?

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We can conclude that a dog has lungs.

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Example of inductive reasoning: If the sun has risen in the east every day of our lives, what can we conclude?

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We can conclude that the sun will rise in the east tomorrow.

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What is a valid conclusion in deductive reasoning?

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A valid conclusion in deductive reasoning is one that logically follows from the premises. For example, if the premises are true, the conclusion must also be true.

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What is the difference between deductive and inductive reasoning?

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Deductive reasoning starts with general principles and leads to a specific conclusion, while inductive reasoning starts with specific observations and leads to general conclusions.

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CCSS.RL.11-12.1

CCSS.RL.9-10.1

CCSS.RI.8.1

CCSS.RI.8.8

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If it is raining, then the ground is wet. It is raining. What can we conclude?

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We can conclude that the ground is wet. (This is an example of deductive reasoning.)

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If all birds lay eggs and a penguin is a bird, what can we conclude?

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We can conclude that a penguin lays eggs. (This is an example of deductive reasoning.)

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What is a common mistake in inductive reasoning?

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A common mistake in inductive reasoning is making a hasty generalization, which is drawing a conclusion based on insufficient evidence.

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CCSS.RL.11-12.1

CCSS.RL.9-10.1

CCSS.RL.8.1

CCSS.RI.8.8

CCSS.RI.8.1