Deductive/Inductive Reasoning Quiz

Inductive

The Giants have lost their last seven games. They are the worst team in the league!

Deductive

If you brush and floss your teeth daily then you will have fewer cavities. Marie brushes and flosses her teeth daily. Thus, she will have fewer cavities.

Deductive

Billy likes playing tennis with Tommy. Billy will not play tennis today. Thus, Tommy will not play.

Inductive

4 out of 5 times I beat Corey at pool and I'm going to play him tomorrow. So, I'll very likely win.

Deductive

If Bush's popularity goes below 20% then he'll be forced to cut and run from Iraq, but that's not the case now.

Inductive

No man has ever gotten pregnant. Thus, no man ever will get pregnant.

Inductive

Most people are pro-choice on abortion. At least most of the people I know.

Deductive

John is a heavy drinker. After all, he's Irish.

Inductive

It has been observed that earthquakes precede the eruption of volcanoes. Thus, earthquakes cause volcanoes to erupt.

Deductive

All students go to school. You are a student. Therefore you go to school.

Deductive

All birds can fly. An ostrich is a bird. Therefore an ostrich can fly.

Deductive

To graduate from school, a student must earn twenty credits. Sal will graduate next month. Therefore, Sal must have earned twenty credits.

Inductive

Rufus and Rose came back from the beach with sunburns. It must have been a sunny day at the beach.

Inductive

Five of the twenty students surveyed like the new dance policy. Those five were from the senior class. The senior class likes the new policy.

Deductive

Generally, when food consumed contains more calories than needed, the excess calories are stored as fat. Many teenagers eat far more high calorie foods than their bodies need. Consequently, many teenagers are overweight.

Inductive

Two episodes of the Big Bang Theory made me laugh and laugh LOLOLOLOL! Therefore, The Big Bang Theory is always funny.

Deductive

Every day, I leave for work in my car at eight o'clock. Every day, the drive to work takes 45 minutes I arrive to work on time. Therefore, if I leave for work at eight o'clock today, I will be on time.

Inductive

Jimmy got bitten by a dog. Jimmy is now scared of all dogs.

Deductive

All even numbers are divisible by 2. 28 is even. Therefore 28 is divisible by 2

Deductive

All chemists are smart, since chemists are scientists and all scientists are smart.

Inductive

Earth, Mars, and Jupiter travel about the sun in elliptical orbits; therefore, all planets travel about the sun in elliptical orbits.

Inductive

My daddy has curly hair. My brother has curly hair. Therefore everyone I am related to has curly hair

Deductive

Since all squares are rectangles, and all rectangles have four sides, all squares have four sides.

Deductive

All dogs are mammals. All mammals have kidneys. Therefore all dogs have kidneys.

Deductive

All men are mortal. Socrates is a man. Therefore, Socrates is mortal.

Deductive

Alice is going to the emergency room because she has fractured her arm. Bone fractures are always painful. Therefore, Alice is in pain.

Inductive

The last 10 windstorms in this area have come from the north and been preceded by a cloud of dust. I can see a big cloud of dust in the distance; so, a new windstorm is probably coming from the north.

Inductive

The chair in the living room is red. The chair in the dining room is red. The chair in the bedroom is red. All chairs in the house are red.

Inductive

Two-thirds of the students at this college receive student aid. Therefore, two-thirds of all college students receive student aid.

Deductive

Cacti are plants and all plants perform photosynthesis; therefore, cacti perform photosynthesis.