Argument Guidelines and Avoiding Logical Fallacies
Submitted by bradb on Mon, 11/08/2004 - 14:13.
Argument Advice and Guidelines
Argument is concerned with questions of judgment, not taste
- Judgment is joined to the logical and reasonable
- It's best to reveal points often overlooked
- It's a good idea to define your terms so your audience
knows exactly what you are talking about. [consult a
dictionary if you need]
Having a Debatable Point
- You need an argumentative edge.
- The main point/assertion--Thesis statement--must be open
to dispute and able to be viewed from more than one side. - Statements of fact are not debatable, neither are
statements about personal tastes and preferences. - A point is Debatable if no amount of reasoning by an
expert or support by statistics can prove the truth or
fallacy of the statement.
Supporting the Claim
- Offer the reader convincing reasons why your position is
X because of Y. - Choose reasons carefully to move your audience
- If you use outside sources (as this assignment requires),
choose reliable and authoritative ones. - Use hard evidence [facts] and not soft evidence
[opinion]. - Conclusions based on soft evidence will often not stand
up to scrutiny.
To Argue a Point Persuasively You Must do the Following
- Offer convincing reasons
- Arguments only as good as the reasons used to support it.
- You have to make your readers agree with you, or at least
see the point you are making - Use only the best evidence.
Appeal to Reason
Induction
- Often you will use induction to reach a generalization
[informed opinion] and then that generalization can be
used deductively to reach a conclusion. - The major premise must be acceptable, minor premise must
be verifiable, and the argument is not overstated. - Induction is from Latin inducere for "to lead,"
to draw along: reasoning from specific evidence to a
general conclusion to move from the specific instances to
the generalizations necessary to make a point and to
establish the cause or causes of something. - The act, process, or result or an instance of reasoning
from a part to a whole, from particulars to generals or
from the individual to the universal. Specific instances
which lead to a generalization. - Don't make generalizations too sweeping.
Deduction
- Applying a proven generalization to a specific case,
using generalizations to arrive at a specific conclusion.
. - The conclusion is arrived at inductively, so induction is
used often times to set up deductive arguments. - The generalization must be accepted and the specific
instance must be a fact for the conclusion to be
accurate. - Illogical deductive arguments usually result from a
faulty major premise or inaccurate generalization.
Syllogism
- Syllogism comes from the Greek "syllogismos"
for 'to calculate with words'. - A deductive scheme of formal argument consisting of a
major premise, a minor premise and a conclusion. - Moves from general to specific. major premise
Syllogism |
|||
|---|---|---|---|
| If 'A' is True | Major Premise/ Generalization |
All Humans are Mortal | Every Virtue is Laudable |
| And 'B' is True | Minor Premise/ Specific Instance |
John is a Human | Kindness is a Virtue |
| 'C' Must be True | Conclusion | John is Mortal | Kindness is Laudable |
Toulmin Model
- Combination of inductive and deductive reasoning schemes.
- Concerned more with probability than certainty. See the
following examples.
Claim
- Equivalent to the conclusion or what the writer wants to
prove;
Data
- The information or evidence a writer offers in support of
the claim;
Warrant
- A general statement that establishes a trustworthy
relationship between the data and the claim. Leads to
conclusion that is probably true. - Claim and data must be specific/explicit
Assumptions
underlie this warrant - (such as that the data is valid)
- Be prepared to back up warrant.
Toulmin Model of Logic |
|||
|---|---|---|---|
| Claim | Conclusion | Raymond is an American citizen | |
| Data | Minor Premise | Raymond was born in Puerto Rico | |
| Warrant | Major Premise | Anyone born in Puerto Rico is an American citizen |
|
The warrant is false because a French tourist who has a child
while vacatioining in Puerto Rico may chose between American and
French citizenship for their child.
| Claim | Conclusion | Raymond is probably an American citizen |
| Data | Minor Premise | Raymond was born in Puerto Rico |
| Warrant | Major Premise | Anyone born in Puerto Rico is entitled to American citizenship |
Here the warrant is accurate given the above information and
the reasoning is logical given the information. The warrant
establishes a trustworthy relationship between the Data and the
Claim.
Distinguish Hard from Soft Evidence
- Hard evidence equal facts; soft evidence consists of
opinion. - Base conclusions on hard evidence.
- Avoid showy, deceptive conclusions These seem correct at
first, but rarely are. Often based on soft evidence or
ignores important variables--which is why scientific
studies are done in several populations and placebos are
given.
Avoid Faulty Generalizations
- Something true in one case need not be true in all cases:
Blondes have more fun, television is worthless, money
buys happiness. - Often these are stereotypes.
- Often are based on insufficient or irrelevant evidence or
they are too broad and sweeping - Often these faulty generalizations are based on
stereotypes.
Avoid Begging the Question
- Happens when you assume that a debate's premise
underlying your assertion has already been demonstrated
to be true, so you beg your reader to take your word for
it, trust me you say. - You assume what you are arguing to be the case can be
used as evidence to make that case. - Occurs when you assume that a debatable premise
underlying the point you want to make has already been
proven. - These arguments assume that what the arguer is supposed
to be proving is already accepted as having been proven.
Avoid Avoiding the Question
- Often done with an emotional appeal to distract reader
from the real issue. - An appeal to pity, fear, normalcy, flattery, patriotism,
or snob appeal. - Avoids the real issue with material that is irrelevant or
which clouds the issue by making an irrational appeal to
the emotions.
Avoid Bandwagon Approach
- Everyone is doing it, why can't I? Gets readers to agree
by claiming that everyone else agrees. - Following the crowd avoids the real issue.
Avoid Attacking the Opponent
- Name calling or other derogatory statements about their
character ignores the real question and exposes a weak
position.
Avoid Faulty Causal Argument
- Causes can have more than one effect, so make sure the
link is solid and demonstrable. - Often the result of oversimplification, suggesting
relationships that don't exist, the ignoring of evidence
which may run counter to the argument being made, and
denying the real reasons.
Avoid Imposing Either/Or Fallacy
- Leaves out all but the extremes of thespectrum.
- Occurs when the issue is reduced to the two extremes.
- Eliminates all middle ground because you are either for
or against.
Proper Appeals to Emotion
- Such emotional appeals require showing empathy and
identifying with your reader's feelings. - Identify with your opposition's feelings and point of
view.
Acknowledge Opposing Views
- Show respect for the opposition and what is valid about
their argument. - Acknowledge the merit of other opinions.
Maintain a Moderate Tone
- When you act like you are the only authority, then many
people will be turned off by what you have to say no
matter how valid and important your material. - Don't be belligerent, telling anyone who doesn't side
with you that they are fools and being duped by the
opposition.
Recognizing Flaws in Persuasion and Argument
Bogus Claims
- Claims are bogus or false when the persuader promises
more than he or she can prove beyond dispute.
Loaded Terms
- Terms are loaded when they are asked to carry more
emotional weight than the context can legitimately
support: Bush regime, Marxist President Salvador Allende,
Unnecessary adjectives wealthy candidate used to turn the
unwealthy away from the candidate.
Misrepresentation
- Lies, twisting what others have said through
oversimplification - Complex argument reduced to ridicule--ask for evidence to
support claims. - Use quotes within their context.


Recent comments
3 hours 59 min ago
9 weeks 11 hours ago
9 weeks 1 day ago
10 weeks 5 days ago
10 weeks 5 days ago
10 weeks 5 days ago
10 weeks 5 days ago
10 weeks 5 days ago
11 weeks 21 hours ago
11 weeks 1 day ago