Notes on Critical Reasoning: Language, Meaning, and Argument Evaluation
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Language: Meaning and Definition
The unit discusses how language conveys meaning and how to define meaning in arguments.
A garbled example shows the symbol: 13315x=-3 (note: included as an example of a symbolic expression encountered in the material).
The material juxtaposes general language use with formal logic to understand how meaning operates in arguments.
Distinguishing Deductive vs Inductive Arguments
There are cases where it’s ambiguous whether an argument is deductively invalid or a weak/minimally strong inductive argument.
A quick takeaway: some arguments can blur lines between being deductive and inductive.
Key question: how strongly the conclusion follows from the premises (the strength of the inferential claim) is a core, objective feature of an argument.
Three factors to evaluate the inferential claim:
Special indicator words.
The actual strength of the inferential link between premises and conclusion.
The character or form of argumentation.
Factors can conflict within a single argument, leading to different interpretations.
Illustrative guidance:
If an argument has a specific deductive character or form (e.g., a categorical syllogism), it strongly indicates a deductive nature.
Inductive indicators: phrases like "It probably follows that…" suggest induction.
Deductive indicators: phrases like "It necessarily follows that…" should be evaluated carefully (they can be used rhetorically to inflate strength).
Premises that provide absolute support for the conclusion are always deductive.
Premises that provide only probable support are the least definitive and may point to induction.
Hierarchy of importance when factors conflict (in order):
Premises provide absolute support for the conclusion (deductive).
Presence of a specific deductive character or form (e.g., categorical syllogism).
Special indicator words and the strength of the inferential link.
Inductive indicator language (e.g., "It probably follows that…").
Deductive indicator language (used rhetorically to appear stronger).
Premises provide only probable support (weakest).
Important caveat: many ordinary-language arguments are incomplete, and none of the indicators may be clearly present, making it hard to determine inductive vs deductive status.
Example of potential conflict: concluding from a categorical syllogism might be read as inductive if the arguer explicitly hedges with weak language.
Methods for Analyzing Arguments (Hurley reference)
1.5 showed how the Counterexample Method can prove invalidity in short, standard formal arguments.
For longer, extended arguments, diagramming methods map out four basic patterns:
1) vertical pattern
2) horizontal pattern
3) conjoint premises
4) multiple conclusions
Language Functions: Information vs Emotion
Language serves multiple purposes: asking questions, telling stories, telling lies, jokes, singing, issuing commands, giving directions, forming hypotheses, guessing, etc.
Two central functions focused on in this material:
1) Conveying information.
2) Expressing or evoking feelings.Emotive meaning vs cognitive meaning:
Cognitive meaning is information-bearing (facts, data, claims).
Emotive meaning evokes feelings and can influence attitudes and motivations.
Example of cognitive information:
It is raining right now. Liquid water drops with diameters greater than 0.5 mm (0.02 inch) fall from the clouds. The hourly rate is moderate between 2.8 to 7.6 mm, with winds of 7 m/s and humidity at 73%.
Example of emotive expression:
Shel Silverstein: Rain poem evokes feelings about rain rather than asserting a factual claim.
Distinguishing Emotive vs Cognitive Meaning (Detailed)
Emotive meaning is like a hammer: it can be used for social change, motivation, etc., but can also be misused to conceal weak evidence.
There is nothing inherently wrong with emotive meaning; issues arise when emotive language substitutes for cognitively neutral claims and supporting evidence.
Cognitive meaning carries information; emotive meaning carries feelings and attitudinal weight.
In emotively charged passages, there is often embedded cognitive content (including value claims) that require analysis separate from the emotive layer.
Value claims are cognitive claims about what is good/bad, right/wrong, better/worse, more important/less important.
Example given: death penalty argument contains a value claim (immorality) that requires supporting reasons; emotive framing can obscure the need for evidence.
When value claims are couched in emotive terms, the emotive clothing can obscure the need for evidence and can provide psychological momentum to the claim.
The brain tends to accept emotive claims readily if the supporting reasons aren’t made explicit.
Disentangling emotive meaning from cognitive content is essential for proper logical evaluation.
Terminology: Cognitive vs Emotive Meaning in Everyday Language
Terminology such as 'legal', 'thirty six states', 'record' tends to carry cognitive meaning (information conveyance).
Emotive terminology like 'cruel', 'inhuman', 'bloodlust' evokes feelings (emotive meaning).
Statements can fulfill multiple roles simultaneously: emotive and cognitive; often, a crucial cognitive component is a value claim.
The job of a good logician is to disengage cognitive meaning from emotive meaning and treat them as separate statements.
Why Emotive Language is Widespread (Practical Observations)
Value claims often require evidence; emotive framing can obscure the need for evidence yet provide momentum for the claim.
Intellectual laziness and a lack of supporting reasons reinforce the appeal of emotive terminology.
Examples of Emotive Terminology Used in Place of Evidence
Examples:
"That driver is crazy!" (Value claim about behavior; no supporting evidence provided.)
"This supplement is fantastic!" (Value claim about effectiveness; no supporting evidence provided.)
These illustrate substituting emotive terms for needed evidence.
Real-World Emotive Language in Advertising and Public Communication
An example involving the Korean MFDS (Ministry of Food and Drug Safety) condemns misleading ads for foods and health functional foods that claim to improve memory and immunity.
Observations include:
51 external experts involved; 194 cases flagged after inspecting 1,015 e-commerce sites; many ads made untrue or exaggerated claims.
Ads misled consumers to treat general foods as health functional foods or medicines.
Some claims (e.g., aiding sleep or immune health) are not recognized by authorities.
This section demonstrates how emotive, sensational terms in advertising can mislead consumers and evade critical scrutiny.
Emotive Terminology in Branding and Politics
Pharmaceutical branding often uses emotive terminology (e.g., Lunesta (moon), Celebrex (celebrate), Abilify (enables)) to evoke positive feelings about products.
Well-known examples of emotive political language include:
Trump’s tweets (content warning) using emotive framing.
Nixon’s Checkers Speech (1952) appealing to honesty and integrity, using emotive appeals to shape public perception.
How Emotive Language Operates in Arguments (Mechanisms and Remedies)
Mechanisms:
1) Allows value claims to be made without evidence, giving arguments a steamroller effect that can crush counterarguments before they’re considered.
2) Paralyzes logical thought, making illogical arguments harder to detect.Remedy:
Disengage the value claim and related cognitive meanings from the emotive meaning, then re-express them as distinct premises so they can be evaluated on their own.
Worked Example: Reframing an Argument (Boland example)
Original implicit argument (paraphrase):
Premises about space program achievements (rocks on the moon, tadpoles in weightless environment) are less important than domestic needs (hunger, unemployment).
Premises also suggest international efforts have solved global problems, which may minimize domestic concerns.
Conclusion: Redirect funds from space program and international actions to domestic problems.
Reframed in emotively neutral language:
(1) The space program has focused on rocks and tadpoles.
(2) Domestic hunger and unemployment are more important than rocks or tadpoles.
(3) International efforts have addressed many global problems, but not our domestic issues.
(4) Therefore, funds should be redirected to domestic problems.
Evaluation:
Premises (1, 3, possibly 4) may be false or debatable; the argument’s strength depends on the truth of these premises.
Cognitive Meaning: Vagueness and Ambiguity
Cognitive meaning can be vague or ambiguous:
Vague expression: allows borderline cases where applicability is unclear (e.g., "Today our job situation is more transparent").
Characteristics: range of interpretations; unclear boundaries.
Ambiguous expression: has more than one clear meaning in a given context.
Distinctions:
Vague terms produce a continuous range of interpretations that can overlap.
Ambiguous terms produce multiple, distinct interpretations that do not overlap.
Why Vagueness and Ambiguity Matter
In logic and philosophy, ambiguity/vagueness halt progress until clarified.
Real-world relevance includes legal definitions, courtroom terms (e.g., injustice, harassment, violence), and religious classification (e.g., Scientology debates about tax status).
In verbal disputes, disagreements may arise over whether issues are factual or verbal (ambiguous or vague).
Handling Disputes: Fact vs Verbal vs Mixed
Steps when facing disputes:
1) Determine whether the dispute is factual, verbal, or a mix.
2) If verbal, assess whether it is ambiguous or vague.
Group Exercise: Wallace Speech (July 4, 1964)
Task: In a group, identify the twenty-five most highly charged emotive words/phrases in Wallace’s speech and classify each as intended to evoke a favorable or unfavorable attitude.
Context: Wallace attacked the Civil Rights Act; the speech is rich in emotive terminology.
Wallace Speech Excerpt (Contextual Reference)
The sample contains passages praising liberty and denouncing portions of civil rights legislation as harmful.
The activity highlights how emotive language can frame political debate and influence audience perception.
Conclusion Exercise: Analyzing an Argument
One person identifies the conclusion.
The next uncovers hidden assumptions and emotionally charged value claims.
The next translates those claims into emotively neutral premises.
This process helps evaluate whether the premises adequately support the conclusion after removing emotive masking.
Notable References and Examples
MLK Jr. excerpt from I Have A Dream (as an example of language use in public rhetoric).
Shel Silverstein: Rain (poem illustrating emotive vs cognitive meaning).
Hurley’s discussion on value claims and emotive language (page 79 reference).
Boland’s critique example (space program vs domestic needs) as a structured demonstration of separating emotive framing from premises.
Real-world advertising and regulatory examples (MFDS case) showing consequences of emotive marketing.
Checkers Speech and political discourse exemplars for emotive language impact.
Summary Takeaways
Distinguish between deductive and inductive reasoning using the strength of inference, indicator words, and argument form.
Be able to recognize and separate emotive meaning from cognitive meaning, particularly isolating value claims for evaluation.
Recognize when language is vague or ambiguous and apply appropriate clarification strategies before proceeding with analysis.
Use methods like counterexamples and diagramming to test validity and structure of arguments.
Practice reframing emotively charged arguments into neutral premises to assess logical support.
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