Inductive
Deductive
Which One?
Which one, again?
Vocabulary
100
Give the answer. The exploration of Mars has produced some surprising facts. They are going to explore Jupiter. Therefore....
The exploration of Jupiter will produce some surprising facts.
100
Give the answer. All men are mortal. Socrates is a man.
Socrates is mortal.
100
Answer inductive or deductive reasoning. Johnny is a bachelor. All bachelors are single. Therefore, Johnny is single.
Deductive reasoning.
100

Steps: Observation, Observe a pattern, Form a statement

Inductive

100

 Inductive Reasoning

Making a conclusion based on observations and patterns


200
Give the answer. All the cats I have seen have tails. Therefore....
All cats have tails.
200
Bob is a sumo wrestler. Sumo wrestlers weigh a lot.
Bob weighs a lot.
200
Answer inductive or deductive reasoning. Jennifer leaves for school at 7 am and is on time. Therefore, if Jennifer leaves for school at 7 am she will always be on time.
Inductive reasoning.
200

All farmers have trucks. Karen has a truck. Karen is a fermer. 

Deductive

200

 Conditional Statement

A statement that can be written in “if-then” form


300
Give the answer. Jill and Bob are friends. Jill likes to write, cook and dance. Bob likes to write and cook. Therefore....
Bob likes to dance.
300
Give the answer. Democrats favor social services. Candidate B favors social services. Therefore....
Candidate B is a Democrat
300
Answer inductive or deductive reasoning. All the swans we have seen are white; therefore, all swans are white.
Inductive reasoning.
300

Bees are on daisies. All flowers observed had bees on them. Bees like all types of flowers. 

Inductive

300

Contrapositive

Formed by negating and switching the hypothesis and conclusion

400
Give the answer. Every time I have eaten shrimp, I have gotten stomach cramps. Therefore....
Whenever I eat shrimp, I get stomach cramps.
400
All flight attendants must know how to swim. Ralph is a flight attendant. Therefore...
Ralph knows how to swim.
400
Answer inductive or deductive and give the answer. My dog runs 25 mph. I run 14 mph. What can be concluded?
Deductive reasoning; My dog is faster than me.
400

Finish this...Dolphins are mammals. All mammals have kidneys.

Dolphins have kidneys. 

400

Deductive Reasoning

The process of reasoning logically and drawing a conclusion from given facts and statements

500
Give the answer. All the doctors I know are smart. Suzie is a doctor. Therefore....
Suzie is smart.
500
Give the answer. The members of Hassling family are Betty, Aaron and Lucas. Betty is thin, Aaron is thin, Lucas is thin and Jerry is fat. Therefore.....
All members of the Hassling family are thin, because Jerry is not a member of the Hassling family.
500
Answer inductive or deductive and give the answer. Mary and Sue are friends. Mary enjoys fishing, running and rock climbing. Sue likes fishing and rock climbing.
Inductive reasoning; Sue must also like running.
500

Starts with a broad statement, supported by observations, ends with a specific statement. 

Deductive

500

Converse

Formed by switching the hypothesis and conclusion

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