Subjective claims
assert that something should exist and present evidence derived from ethical, moral, or aesthetic convictions
Argument
a form of discourse in which the writer or speaker presents a pattern of reasoning (reinforced by detailed evidence and a refutation of counterargument); and tries to convince the audience to accept the claim, that the arguer's point of view is sensible and worthy of serious consideration (if not outright acceptance).
Three basic part of argument
relevant information (as much as possible)
convincing evidence (supporting claim)
pattern of reasoning (logical progression from thesis/claim to support to conclusion)
Stategies of reasoning
deduction, induction, categorization, analogy, authorization, plea
Pattern of reasoning
logical progression; defined unfamiliar terms or concepts; enough background info to provide context.
Detailed evidence
must be accurate, timely, relevant, and efficient; distinguished as indisputable (factual) and disputable (not verifiable)
First-hand Evidence
Personal experience, observation, or general knowledge. Anecdotes and current events are forms of first-hand evidence.
Second-hand Evidence
Evidence that is accessed through research, reading, and investigation. It includes factual and historical information, expert opinion, and quantitative data
the APPEALS
Ethos - authority, traditional values, ethical and moral behavior
Pathos - feelings and basic human needs such as security, love, belonging, health, and well-being
Logos - reason and rational thinking (especially facts and data)
Models of Argumentation
Classical, Toulmin, Rogerian
Classical Model of Argumentation
neutral audience; committed arguer; appeals and evidence; relies of fundamentals of rational thinking
Toulmin Model of Argumentation
complex, real world issues; emphasis on ethics and values, not just evidence; complex claims that must be qualified; everything must be supported and proven
Rogerian Model of Argmentation
specific audience; compromise, solution based, seeks common ground, moves away from win/lose and pro/con
Classical Model outline
introduction; background; lines of reasoning; alternative arguments; conclusion
Rogerian Model outline
introduction; contexts; writer's position; benefits to the opponent
Toulmin Model outline
claim; stated position (with a "because clause" & often a Qualifier); data or grounds; warrant; backing
Objective claims
assert something that actually exists and presents evidence that is factual; present themselves as objective truths, but not self-evident truths
Deductive Reasoning
Concluding assertions you know to be true; reasoning from the general to the specific
Inductive Reasoning
arriving at a conclusion that is based on what you judge to be sufficient evidence; reasoning from the specific to the general
Categorization
placing an idea/ issue in a larger context (using strategies of definition, classification, & division)
Analogy
trying to enhance the validity of a claim by comparing it to a similar situation, but in a different context
Cause and Effect
explains why things have/will happen; shows purpose; links things to higher values; shows link between what happens first and next; goes beyond correlation to give refutable evidence of casualty
Authorization
establishes the validity of a claim by invoking authority (personal testimonial from expert of pre-established policy/law)
Plea
uses emotional expressions of feeling to aid/defend an assertion
In ________________________, an arguer needs to assure they are not relying on unsupported generalizations, stereotypes, or assumptions.
deductive reasoning
In ____________________________, the arguer needs to make sure the number of samples is adequate, and that the samples are reliable
inductive reasoning
In _____________________, the arguer needs to make sure definitions are clear
categorization
In _______________________________, the arguer needs to watch out for mistaking temporal relationships for causal
cause and effect reasoning
In _____________, the arguer needs to assure the expertise of the "authority"
authority
In ______________, the arguer needs to make sure that the situations have more in common than superficial characteristics
analogy
Hasty Generalization
a fallacy in which a speaker jumps to a general conclusion on the basis of insufficient evidence
Slippery Slope
A fallacy that assumes that taking a first step will lead to subsequent steps that cannot be prevented
Straw Man
A logical fallacy that involves the creation of an easily refutable position; misrepresenting, then attacking an opponent's position.
False Dilemma
A fallacy of oversimplification that offers a limited number of options (usually two) when in fact more options are available.
Post Hoc/False Cause
Assuming that because B comes after A, A caused B.
Red Herring
A fallacy that introduces an irrelevant issue to divert attention from the subject under discussion
Genetic Fallacy
Arguments that state that an idea should be discounted simply because of its source or origin.
Ad populum
This fallacy occurs when evidence boils down to "everybody's doing it, so it must be a good thing to do."
Ad Hominem
a fallacy that attacks the person rather than dealing with the real issue in dispute
Weak Analogy
Claiming that items with only minor similarities are the same in almost everything else.
Appeal to Authority
A fallacy in which a speaker or writer seeks to persuade not by giving evidence but by appealing to the respect people have for a famous person or institution.
Tu Quoque
Dismissing someone's viewpoint on an issue because s/he is inconsistent in that very thing (hypocritical).
Appeal to Ignorance
A fallacy that uses an opponent's inability to disprove a conclusion as proof of the conclusion's correctness.
Begging the Question
asks the reader to simply accept the conclusion without providing real evidence (aka circular reasoning); restates the argument rather than actually proving it
Equivication
Using words that have at least two different definitions to support or refute an issue
Non Sequiter
Latin for "it does not follow." When one comment isn't logically related to another.
Affirming the Consequence
the first part of the assertion (the '"if" clause) is the antecedent and the second part (the "then" clause) is called the consequent.
Card-Stacking
omitting facts that challenge your position
Syllogisms
proper analysis of premises; to arrange premises so that only one true conclusion is possible
Invalid Syllogisms
if used carelessly, syllogisms can instill a false sense of confidence in unsupported conclusions
Enthymemes
A shortened syllogism which omits one premise, usually the major premise, allowing the audience to fill it in.