CS212 Unit 7 Written English & Logical Fallacies Activity Notes
Effective written English requires more than correct grammar. It combines strong sentence structure, logical reasoning, and persuasive communication to help writers express ideas clearly and convincingly. By understanding clauses, conjunctions, phrases, rhetorical appeals, modifiers, prepositions, and logical fallacies, students can improve academic writing, avoid common mistakes, and create well-supported arguments. These concepts are essential for success in college assignments, workplace communication, and everyday writing.
Why Written English and Logical Reasoning Are Important
Strong writing is built on both language skills and critical thinking. Correct grammar alone is not enough if ideas are not organized logically or arguments lack evidence. Understanding the fundamentals of written English allows writers to communicate with confidence while making their work easier to read and more persuasive.
Benefits of mastering written English include:
Creating clear and organized sentences
Writing stronger academic essays and research papers
Building persuasive arguments supported by evidence
Avoiding common logical and grammatical mistakes
Improving reading comprehension and critical thinking
Enhancing professional communication skills
Understanding Logical Fallacies
Logical fallacies are errors in reasoning that weaken an argument. Instead of relying on facts and evidence, they often depend on misleading assumptions, emotional appeals, or unsupported conclusions. Recognizing these fallacies helps both writers and readers evaluate information more critically.
Ad Hominem
An ad hominem fallacy attacks the individual presenting an argument rather than addressing the argument itself.
Example:
Instead of discussing a scientist’s research findings, someone dismisses the study by criticizing the scientist’s personal character.
Bandwagon Fallacy
A bandwagon fallacy assumes something must be true simply because many people believe or support it.
Example:
“Everyone uses this study method, so it must be the most effective.”
Begging the Question
This fallacy occurs when an argument simply repeats its conclusion without providing supporting evidence.
Example:
“This policy is successful because it works well.”
Either-Or Fallacy (False Dilemma)
A false dilemma presents only two possible choices when several alternatives actually exist.
Example:
“You are either with us or against us.”
Equivocation
Equivocation uses a word or phrase with multiple meanings to create confusion or a misleading conclusion.
False Analogy
A false analogy assumes that two different things are alike in every way because they share one characteristic.
False Authority
A false authority fallacy occurs when someone without relevant expertise is presented as a reliable source.
Example:
An actor giving professional medical advice.
False Cause
A false cause fallacy assumes that because one event happened before another, it must have caused it.
Example:
“I wore my lucky shoes, so our team won the game.”
Guilt by Association
This fallacy unfairly judges someone based solely on their relationship with another person or group.
Hasty Generalization
A hasty generalization draws broad conclusions using limited or insufficient evidence.
Non Sequitur
A non sequitur occurs when a conclusion does not logically follow from the previous statement.
Oversimplification
Oversimplification reduces a complex issue to a single explanation while ignoring important contributing factors.
Red Herring
A red herring introduces irrelevant information to distract attention from the main issue.
Slippery Slope
A slippery slope claims that one action will automatically lead to a chain of negative events without sufficient evidence.
Understanding Clauses
A clause is a group of words containing both a subject and a verb.
Independent Clause
An independent clause expresses a complete thought and can stand alone as a sentence.
Examples:
The pumps failed.
The ship sank.
Many passengers did not notice the collision.
Dependent Clause
A dependent clause (also called a subordinate clause) contains a subject and a verb but cannot stand alone because it does not express a complete thought.
Examples:
When the ship collided with the iceberg…
If the ship had struck the iceberg head-on…
Because the weather worsened…
Understanding Conjunctions
Conjunctions connect words, phrases, and clauses, making writing smoother and more cohesive.
Coordinating Conjunctions
These conjunctions connect words or clauses of equal importance.
Common coordinating conjunctions include:
And
But
Or
Nor
For
So
Yet
Correlative Conjunctions
Correlative conjunctions always appear in pairs.
Examples include:
Both…and
Either…or
Neither…nor
Not only…but also
Subordinating Conjunctions
Subordinating conjunctions connect dependent clauses to independent clauses.
Common examples include:
Because
Although
Since
When
While
If
Unless
Understanding Phrases
A phrase is a group of related words that functions as a single unit but does not contain both a subject and a verb.
Examples include:
Through the hull
During the storm
After the collision
Phrases commonly function as:
Nouns
Adjectives
Adverbs
Understanding Modifiers
Modifiers add detail by describing or limiting another word within a sentence.
Examples include:
The extremely powerful engine.
The carefully written report.
Using modifiers appropriately makes writing more descriptive, precise, and engaging.
Understanding Prepositions
Prepositions show relationships involving time, place, direction, or manner.
Common prepositions include:
About
Above
Across
Against
Around
At
Before
Behind
Below
Between
By
During
For
From
In
Into
Near
Of
On
Over
Through
To
Toward
Under
Until
Upon
With
Within
Without
Understanding Run-on Sentences
A run-on sentence occurs when two or more independent clauses are joined incorrectly without proper punctuation or conjunctions.
Incorrect:
The ship hit the iceberg, many passengers remained calm.
Correct:
The ship hit the iceberg, but many passengers remained calm.
Proper punctuation and conjunctions improve sentence clarity and readability.
Understanding Rhetorical Appeals
Persuasive writing often relies on three classical rhetorical appeals that help influence an audience.
Ethos
Ethos appeals to credibility and trustworthiness by demonstrating expertise, reliability, and authority.
Logos
Logos appeals to logic by presenting facts, research, statistics, and evidence to support an argument.
Pathos
Pathos appeals to emotions by encouraging empathy, concern, or motivation.
Effective persuasive writing often combines all three rhetorical strategies to create balanced and convincing arguments.
Understanding Oxymorons
An oxymoron combines two contradictory words to create emphasis or a memorable expression.
Common examples include:
Deafening silence
Bittersweet
Poor little rich girl
Living dead
Oxymorons are commonly used in literature, speeches, and creative writing to add meaning and stylistic impact.
Quick Reference Guide
| Term | Definition |
|---|---|
| Clause | A group of words containing a subject and a verb. |
| Independent Clause | A complete thought that can stand alone. |
| Dependent Clause | A clause that requires an independent clause to complete its meaning. |
| Phrase | A group of words without both a subject and a verb. |
| Modifier | A word or phrase that describes another word. |
| Preposition | A word showing relationships involving time, place, or direction. |
| Conjunction | A word that connects words, phrases, or clauses. |
| Ethos | Appeal to credibility and trustworthiness. |
| Logos | Appeal to logic and evidence. |
| Pathos | Appeal to emotion and empathy. |
| Logical Fallacy | An error in reasoning that weakens an argument. |
Frequently Asked Questions
What is a logical fallacy in writing?
A logical fallacy is an error in reasoning that weakens an argument. Rather than relying on evidence, logical fallacies often use emotional appeals, misleading assumptions, or unsupported conclusions.
What is the difference between an independent clause and a dependent clause?
An independent clause expresses a complete thought and can stand alone as a sentence. A dependent clause also contains a subject and verb but cannot stand alone because it requires an independent clause to complete its meaning.
What are the three rhetorical appeals?
The three rhetorical appeals are:
Ethos: Builds credibility and trust.
Logos: Uses logic, evidence, and facts.
Pathos: Appeals to emotions and empathy.
Together, these techniques strengthen persuasive communication.
What is the purpose of conjunctions?
Conjunctions connect words, phrases, and clauses, making writing smoother, more organized, and easier to understand.
Why is it important to recognize logical fallacies?
Recognizing logical fallacies helps readers evaluate information critically while enabling writers to develop stronger, more credible, and evidence-based arguments.
Final Thoughts
Written English is built on grammar, sentence structure, and logical reasoning. Learning how clauses, conjunctions, phrases, modifiers, prepositions, rhetorical appeals, and logical fallacies work together allows students to communicate more clearly and write with greater confidence. Whether preparing academic assignments, professional documents, or persuasive essays, mastering these foundational concepts improves readability, strengthens arguments, and enhances overall writing quality.
References
American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.). https://apastyle.apa.org/
Encyclopaedia Britannica. (n.d.). Rhetoric. https://www.britannica.com/topic/rhetoric
CS212 Unit 7 Written English & Logical Fallacies Activity Notes
Lunsford, A. A. (2021). The St. Martin’s handbook (9th ed.). Bedford/St. Martin’s. https://www.macmillanlearning.com/
Purdue Online Writing Lab. (n.d.). Grammar. https://owl.purdue.edu/owl/general_writing/grammar/
University of North Carolina Writing Center. (n.d.). Fallacies. https://writingcenter.unc.edu/tips-and-tools/fallacies/