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lesson 2-2, Study notes of Reasoning

Washington State University (WSU or Wazzu)Reasoning

THEREFORE,. SOCRATES IS MORTAL. Page 5. MORE EXAMPLES. PREMISE: ALL DOLPHINS ARE MAMMALS. PREMISE: ALL MAMMALS HAVE KIDNEYS. CONCLUSION: ALL DOLPHINS HAVE ...

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2022/2023

Uploaded on 02/28/2023

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LESSON 2-2
DEDUCTIVE REASONING
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Download lesson 2-2 and more Study notes Reasoning in PDF only on Docsity!

LESSON 2- 2

DEDUCTIVE REASONING

DEFINITION

• DEDUCTIVE REASONING IS A LOGICAL ASSUMPTION OR

CONCLUSION, THAT IS DRAWN FROM VALID OR INVALID

PREMISES. IN DEDUCTIVE REASONING, NO OTHER FACTS,

OTHER THAN THE GIVEN PREMISES, ARE CONSIDERED.

EXAMPLE

ONE OF THE MOST FAMOUS EXAMPLES OF DEDUCTIVE

REASONING IS FROM ARISTOTLE:

• ALL MEN ARE MORTAL. SOCRATES IS A MAN. THEREFORE,

SOCRATES IS MORTAL

MORE EXAMPLES

PREMISE: ALL DOLPHINS ARE MAMMALS.

PREMISE: ALL MAMMALS HAVE KIDNEYS.

CONCLUSION: ALL DOLPHINS HAVE KIDNEYS.

YOU TRY

PREMISE: ALL APPLES ARE FRUITS.

PREMISE: THE HONEY CRISP IS A TYPE OF APPLE.

CONCLUSION: THE HONEY CRISP IS A FRUIT.

YOU TRY

PREMISE: ALL SQUARES ARE RECTANGLES.

PREMISE: RECTANGLES HAVE FOUR SIDES.

CONCLUSION: ALL SQUARES HAVE FOUR SIDES.