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Cost of Fallacious Reasoning
Sujal Upadhyay
BIM 7th Semester
Critical Thinking and Decision Making
Fallacy
• It is a type of argument that seems
to be correct but on verifying it may
not be correct.
Types of Fallacy
Fallacies of Relevence:
• Arguments are irrelevent to conclusion
• If he fails in exam then he says that his father was
ill
Fallacies of Defect Induction:
• The connection between arguments and
conclusion is not strong enough to support the
conclusion
• He met two americans, both were white and says
all americans are white
Fallacies of Presumption
• Too much is asumed in the premises
• If someone takes some photographs then he is
a photographer
Fallacies of Ambiguity
• Ambigious word or phrase has multiple
meanings in different situations
• Using these phares in arguments does not
support the conclusion
• Ram is a boy and all boys can run fast then
Ram can also run fast
Common Problems of Critical
Thinking
Association effect:
• If two events occur at the same time, our
mind will form association between them.
• If it is heard that a sumo crashed this morning
and Ram was travelling in sumo the same
morning then we may think ram was in the car
crash.
Incomplete Comparisions:
• Comparisions are made without providing the
other half of camparision.
• In a group of students, if it is said that Ram is tall
and he can run fast then taller than who? Faster
than who? Is not mentioned.
Weak Analogies:
• Two events or objects are analogous when ther
share common properties.
• If Shyam can play football then Ram also can
because they are brothers.
Part-Whole:
• Whatever is true of the whole, is also true of
all its parts and vice versa.
• If it is said that students of BIM are intelligent
then some of them may not be so.
Irrelevent Reasons:
• Reasons or arguments are not related to
conclusion.
• All students should take foreign classes, it will
help to improve quality of education.
Thank You

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Cost of fallacious reasoning

  • 1. Cost of Fallacious Reasoning Sujal Upadhyay BIM 7th Semester Critical Thinking and Decision Making
  • 2. Fallacy • It is a type of argument that seems to be correct but on verifying it may not be correct.
  • 3. Types of Fallacy Fallacies of Relevence: • Arguments are irrelevent to conclusion • If he fails in exam then he says that his father was ill Fallacies of Defect Induction: • The connection between arguments and conclusion is not strong enough to support the conclusion • He met two americans, both were white and says all americans are white
  • 4. Fallacies of Presumption • Too much is asumed in the premises • If someone takes some photographs then he is a photographer Fallacies of Ambiguity • Ambigious word or phrase has multiple meanings in different situations • Using these phares in arguments does not support the conclusion • Ram is a boy and all boys can run fast then Ram can also run fast
  • 5. Common Problems of Critical Thinking Association effect: • If two events occur at the same time, our mind will form association between them. • If it is heard that a sumo crashed this morning and Ram was travelling in sumo the same morning then we may think ram was in the car crash.
  • 6. Incomplete Comparisions: • Comparisions are made without providing the other half of camparision. • In a group of students, if it is said that Ram is tall and he can run fast then taller than who? Faster than who? Is not mentioned. Weak Analogies: • Two events or objects are analogous when ther share common properties. • If Shyam can play football then Ram also can because they are brothers.
  • 7. Part-Whole: • Whatever is true of the whole, is also true of all its parts and vice versa. • If it is said that students of BIM are intelligent then some of them may not be so. Irrelevent Reasons: • Reasons or arguments are not related to conclusion. • All students should take foreign classes, it will help to improve quality of education.