Deductive and Inductive Reasoning

Deductive reasoning means...

• Guessing without any information

• Sounding knowledgeable even when you are not

• Testing and observing patterns to make conjectures

• Drawing conclusions from situations based on facts and definitions

__________________________ uses specific observations and patterns of behavior to make generalizations.

• Deductive reasoning

• Inductive reasoning

What can be concluded from the following statements?
If Mike rakes leaves, then he bags them .
If Mike bags the leaves then he mows the lawn.

• If Mike mows the lawn then he bags the leaves.

• If Mike bags the leaves then he rakes.

• If Mike does not mow the lawn, then he did not rake the leaves.

• If Mike mows the lawn then he bags the leaves.

IF Jimmy named his first child Thing1
AND his second child Thing2
THEN He will name his 3rd child Thing3

• Inductive

• Deductive

What can be concluded from the following statements?
If Tom goes fishing then he brings a pole.
If Tom brings his pole then he catches a fish.

• If Tom goes fishing then he catches a fish.

• If Tom brings his pole then he goes fishing

•  If Tom catches a fish then he brought his pole.

• If Tom brings his pole then he catches a fish.

IF Jimmy named his first child Thing One

AND his second child Thing Two

THEN He will name his third child Thing Three

• Inductive

• Deductive

All observed houses on South Street have roofs that are falling apart.  Sherry lives on South Street.  Her roof is falling apart. 

• Deductive

• Inductive

3...6...9...12...
AND 24...27...30...?
the next term is going to be 33

• Inductive

• Deductive

All cats have a keen sense of smell. Fluffy is a cat, so Fluffy has a keen sense of smell.

• Deductive

• Inductive

Maximillian is a shelter dog. All shelter dogs are happy. Therefore, he is happy.

• Inductive

• Deductive