Reasonings
Acute angles are less than 90 degrees. This angle is 40 degrees, so it must be acute.
Deductive Reasoning
All birds have feathers and all robins are birds. Therefore, robins have feathers.
Deductive Reasoning
All cats have a keen sense of smell. Fluffy is a cat, so Fluffy has a keen sense of smell.
Deductive Reasoning
All dolphins are mammals, all mammals have kidneys; therefore all dolphins have kidneys.
Deductive Reasoning
All horses have manes. The Arabian is a horse; therefore, Arabians have manes.
Deductive Reasoning
All noble gases are stable. Helium is a noble gas, so helium is stable.
Deductive Reasoning
All numbers ending in 0 or 5 are divisible by 5. The number 35 ends with a 5, so it must be divisible by 5.
Deductive Reasoning
Cacti are plants and all plants perform photosynthesis; therefore, cacti perform photosynthesis.
Deductive Reasoning
Elephants have cells in their bodies and all cells have DNA. Therefore, elephants have DNA.
Deductive Reasoning
It's dangerous to drive on icy streets. The streets are icy now, so it would be dangerous to drive.
Deductive Reasoning
Red meat has iron in it and beef is red meat. Therefore, beef has iron in it.
Deductive Reasoning
All brown dogs in the park today are small dogs. Therefore, all small dogs must be brown.
Inductive Reasoning
All the children in this daycare center like to play with Legos. All children must like to play with Legos.
Inductive Reasoning
Bob is showing a big diamond ring to his friend Larry. Bob has told Larry that he is planning to marry Joan. Bob must be surprising Joan with the diamond ring tonight.
Inductive Reasoning
Every cat that you've observed purrs. Therefore, all cats must purr.
Inductive Reasoning
Every chicken we've seen has been brown. All chickens in this area must be brown.
Inductive Reasoning
Every time you eat peanuts, you start to cough. You are allergic to peanuts.
Inductive Reasoning
Every windstorm in this area comes from the north. I can see a big cloud of dust in the distance. A new windstorm is coming from the north.
Inductive Reasoning
Jennifer always leaves for school at 7:00 a.m. Jennifer is always on time. Jennifer assumes, then, that she if she leaves at 7:00 a.m. for school today, she will be on time.
Inductive Reasoning
John is an excellent swimmer. His family has a swimming pool. John's sister Mary must also be an excellent swimmer.
Inductive Reasoning
Michael just moved here from Chicago. Michael has red hair. Therefore, all people from Chicago have red hair.
Inductive Reasoning
Practically every house on South Street is falling apart. Sherry lives on South Street. Her house is probably falling apart.
Inductive Reasoning
Ray is a football player. All the other football players on the high school team weigh more than 170 pounds. Therefore, Ray must weigh more than 170 pounds.
Inductive Reasoning
The chair in the living room is red. The chair in the dining room is red. The chair in the bedroom is red. All the chairs in the house are red.
Inductive Reasoning
The children in that house yell loudly when they play in their bedroom. I can hear children yelling in that house. Therefore, the children must be playing in their bedroom.
Inductive Reasoning
The cost of goods was $1.00. The cost of labor to manufacture the item was $0.50. The sales price of the item was $5.00. So, the item always provides a good profit for the stores selling it.
Inductive Reasoning