Inductive vs. Deductive Reasoning
DEDUCTIVE REASONING: TAKING GENERAL CASES
AND MAKING SPECIFIC EXAMPLES
IF Quadrilaterals have 4 sides

THEN a square is a quadrilateral.
Specific Info
Deductive
reasoning
General Info
DEDUCTIVE
REASONING
EXAMPLE:
My math teacher is skinny
My last math teacher was skinny
Conclusion by inductive reasoning:
All math teachers are skinny
Inductive reasoning takes specific examples
and makes sweeping general conclusions.
Inductive reasoning is used
to find the next term in a pattern:
By inductive reasoning (using the specific
examples to make a general rule to add 10)
the next term is...
10, 20, 30, 40, 50,
DEDUCTIVE
SPECIFIC CASES
GENERALITIES
INDUCTIVE
 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
(
Apply a general rule to specific examples)
All even numbers are divisible by 2
28 is even
Therefore 28 is divisible by 2
 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
3,6,9,12,15,

The next term is going to be 18
(
Apply a general rule to specific examples)
 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
(
My daddy  has curly hair
My brother has curly hair

Therefore everyone I am related to has curly hair
Apply a general rule to specific examples)
 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
An apple a day keeps the doctor away.

Joe ate an apple every day.

Dr. Dre stayed away.
(
Apply a general rule to specific examples)
 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
Jimmy got bitten by a dog .

Jimmy is now scared of all dogs.
(
Apply a general rule to specific examples)
 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
The next term will be 81
(
1,4,9,16,25,36,49,64
Apply a general rule to specific examples)
 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
(
My soda had a roach in it.

All soda has roaches.
Apply a general rule to specific examples)
 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
(
All
Speeders
will be
slapped
Apply a general rule to specific examples)
Jimmy
sped
Jimmy got
slapped
 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
Two episodes of the Big Bang Theory
made me laugh and laugh LOLOLOLOL

Therefore, The Big Bang Theory is always funny.
(
Apply a general rule to specific examples)
Jimmy's next will be named Apricot-Mist Mu Mu Mu Mu
Jimmy named his kids Apricot-Mist,
Aprocot-Mist Mu,
Apricot-Mist Mu Mu, and
Apricot-Mist Mu Mu Mu


 Inductive reasoning
(use specific examples to make a general rule)
 Deductive reasoning
(
Apply a general rule to specific examples)
DEDUCTIVE
The End
SPECIFIC CASES
GENERALITIES
INDUCTIVE
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