COMM FInal Flashcards
Logos
An appeal to logic
using arguments that are
proof and
evidence
Claims
: Propositions of Fact, Value, or Policy
What is a claim backed by
Data
What is data backed by
Assumptions/Reasoning
Deductive reasoning
- Theory
- Hypothesis
- Pattern
- Observation
Inductive reasoning
- Observation
- Pattern
- Hypothesis
4 Theory
Affirming the Antecedent
Premise #1: If A , then
B
Premise #2: A
Conclusion: Therefore,
B
Premise #1: If it is a
Yorkie, then it is a dog.
Premise #2: It is a
Yorkie
Conclusion: Therefore, it
is a dog.
DENYING THE
CONSEQUENT
Premise #1: If A (Cause),
then B (Result)
Premise #2: NOT B
(Result)
Conclusion: Therefore,
not A (Cause)
Premise #1: If burglars entered by
the front door, then they forced the
lock.
Premise #2: Burglars did not force
the lock.
Conclusion: Therefore, they did not
enter by the front door.
DISJUNCTIVE
SYLLOGISM
Premise #1: Either A or B
Premise #2: NOT A
Conclusion: Therefore, B
Premise #1: Either it is red,
or it is blue.
Premise #2: It is not red
Conclusion: Therefore, it is
blue
APPLYING A
GENERALIZATION
Premise #1: Every member of F
is a member of G.
Premise #2: Individual case X is a
member of F.
Conclusion: Therefore, X is a
member of G
APPLYING AN
EXCEPTION
Premise #1: Every member of F
is a member of G.
Premise #2: Individual case X is
NOT a member of G.
Conclusion: Therefore, X is NOT
a member of F
Transitivity
If x=y, and y=z,
then x=z
Alex is a law student.
Law students are critical
thinkers.
Alex is a critical thinker.
Reflexivity
If x=y, then y=x
If Jim is a coworker of
Pam, then Pam is a
coworker of Jim.
Fallacy
Deceptive arguments that appear logical but fall apart with
logical reasoning
Appeals to ignorance
A person concludes that
something is true simply on
the grounds that they cannot
prove it to be false