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5.2: Identifying Thesis Statements and Topic Sentences

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Being able to identify the purpose and thesis of a text, as you’re reading it, takes practice. This section will offer you that practice.

One fun strategy for developing a deeper understanding the material you’re reading is to make a visual “map” of the ideas. Mind maps, whether hand-drawn or done through computer programs, can be fun to make, and help put all the ideas of an essay you’re reading in one easy-to-read format.

Your understanding of what the “central” element of the mind map is might change as you read and re-read. Developing the central idea of your mind map is a great way to help you determine the reading’s thesis.

Figure 2.5. 1

- Hand-drawn Mind Map

Locating Explicit and Implicit Thesis Statements

In academic writing, the thesis is often explicit : it is included as a sentence as part of the text. It might be near the beginning of the work, but not always–some types of academic writing leave the thesis until the conclusion.

Journalism and reporting also rely on explicit thesis statements that appear very early in the piece–the first paragraph or even the first sentence.

Works of literature, on the other hand, usually do not contain a specific sentence that sums up the core concept of the writing. However, readers should finish the piece with a good understanding of what the work was trying to convey. This is what’s called an implicit thesis statement: the primary point of the reading is conveyed indirectly, in multiple locations throughout the work. (In literature, this is also referred to as the theme of the work.)

Academic writing sometimes relies on implicit thesis statements, as well.

This video offers excellent guidance in identifying the thesis statement of a work, no matter if it’s explicit or implicit.

Topic Sentences

We’ve learned that a thesis statement conveys the primary message of an entire piece of text. Now, let’s look at the next level of important sentences in a piece of text: topic sentences in each paragraph.

A useful metaphor would be to think of the thesis statement of a text as a general: it controls all the major decisions of the writing. There is only one thesis statement in a text. Topic sentences, in this relationship, serve as captains: they organize and sub-divide the overall goals of a writing into individual components. Each paragraph will have a topic sentence.

Figure 2.5. 2

It might be helpful to think of a topic sentence as working in two directions simultaneously. It relates the paragraph to the essay’s thesis, and thereby acts as a signpost for the argument of the paper as a whole, but it also defines the scope of the paragraph itself. For example, consider the following topic sentence:

Many characters in Lorraine Hansberry’s play A Raisin in the Sun have one particular dream in which they are following, though the character Walter pursues his most aggressively.

If this sentence controls the paragraph that follows, then all sentences in the paragraph must relate in some way to Walter and the pursuit of his dream.

Topic sentences often act like tiny thesis statements. Like a thesis statement, a topic sentence makes a claim of some sort. As the thesis statement is the unifying force in the essay, so the topic sentence must be the unifying force in the paragraph. Further, as is the case with the thesis statement, when the topic sentence makes a claim, the paragraph which follows must expand, describe, or prove it in some way. Topic sentences make a point and give reasons or examples to support it.

 The following diagram illustrates how a topic sentence can provide more focus to the general topic at hand.

Placement of Topic Sentences

What if I told you that the topic sentence doesn’t necessarily need to be at the beginning? This might be contrary to what you’ve learned in previous English or writing classes, and that’s okay. Certainly, when authors announce a topic clearly and early on in a paragraph, their readers are likely to grasp their idea and to make the connections that they want them to make.

However, when authors are writing for a more sophisticated academic audience—that is an audience of college-educated readers—they will often use more sophisticated organizational strategies to build and reveal ideas in their writing. One way to think about a topic sentence, is that it presents the broadest view of what authors want their readers to understand. This is to say that they’re providing a broad statement that either announces or brings into focus the purpose or the meaning for the details of the paragraph. If the topic sentence is seen as the broadest view, then every supporting detail will bring a narrower—or more specific—view of the same topic.

With this in mind, take some time to contemplate the diagrams in the figure below. The widest point of each diagram (the bases of the triangles) represents the topic sentence of the paragraph. As details are presented, the topic becomes narrower and more focused. The topic can precede the details, it can follow them, it can both precede and follow them, or the details can surround the topic. There are surely more alternatives than those that are presented here, but this gives you an idea of some of the possible paragraph structures and possible placements for the topic sentence of a paragraph.

Consider some of the following examples of different topic sentence placements in a paragraph from a review essay of the beloved children’s book, The Cat in the Hat , by Dr. Seuss. Paragraph structures are labeled according to the diagrams presented above, and topic sentences are identified by red text.

Topic Sentence-Details-Topic Sentence

A good children’s book requires an exciting plot and a problem with which children can sympathize. In The Cat in the Hat there is plenty of action, depicted in the wild antics of the cat, and later in the amazing but dangerous and messy tricks of Thing 1 and Thing 2. All this excitement and action naturally draws children into the story and keeps the plot moving forward at a pace that maintains their interest. There is also tension to be resolved. The fish senses danger and constantly warns the children not to participate in the cat’s perilous stunts. And later, as the mother’s return becomes more imminent, the children begin to heed the fish’s warning and finally wish to contain the chaos and clean up the mess, but how? While this plot is fantastic enough to fuel any child’s imagination, it also contains a problem with which any child can relate: a mess and the threat of a parent’s disapproval. The careful balance of action, tension, and relatability is what makes this book an enduring childhood favorite.

Topic Sentence-Details

The careful balance of action, tension, and relatability is what makes Dr. Seuss’s The Cat in the Hat an enduring childhood favorite. In The Cat in the Hat there is plenty of action, depicted in the wild antics of the cat, and later in the amazing but dangerous and messy tricks of Thing 1 and Thing 2. All this excitement and action naturally draws children into the story and keeps the plot moving forward at a pace that maintains their interest. There is also tension to be resolved. The fish senses danger and constantly warns the children not to participate in the cat’s perilous stunts. And later, as the mother’s return becomes more imminent, the children begin to heed the fish’s warning and finally wish to contain the chaos and clean up the mess, but how? While this plot is fantastic enough to fuel any child’s imagination, it also contains a problem with which any child can relate: a mess and the threat of a parent’s disapproval.

You can relocate the topic sentence to the end here, and you’ll have an example of the Details-Topic Sentence method of organizing the paragraph.

Details-Topic Sentence-Details

In The Cat in the Hat there is plenty of action, depicted in the wild antics of the cat, and later in the amazing but dangerous and messy tricks of Thing 1 and Thing 2. All this excitement and action naturally draws children into the story and keeps the plot moving forward at a pace that maintains their interest. The careful balance of action, tension, and relatability is what makes Dr. Seuss’s The Cat in the Hat an enduring childhood favorite. There is definitely tension to be resolved here. The fish senses danger and constantly warns the children not to participate in the cat’s perilous stunts. And later, as the mother’s return becomes more imminent, the children begin to heed the fish’s warning and finally wish to contain the chaos and clean up the mess, but how? While this plot is fantastic enough to fuel any child’s imagination, it also contains a problem with which any child can relate: a mess and the threat of a parent’s disapproval.

Explicit and Implicit Topic Sentences

Similar to thesis statements, topic sentences may be explicit or implicit.

Consider the following paragraph from an essay titled “The Bothersome Beauty of Pigeons,” by author and Boise State writing professor, Bruce Ballenger. It’s important to note that this is a personal narrative essay rather than a more traditional academic essay, but the paragraph provides a good example of an implied topic. In this essay Ballenger takes the time to consider the beauty of pigeons, a bird that’s usually thought of as nothing more than a nuisance. Just prior to this paragraph, Ballenger talks about how he used a fake owl to scare away pigeons on his property. He goes on to explain,

My pigeons moved next door where an elderly couple feed them bird seed and have the time and willingness to clean up after their new charges; so it seems, in this case, things have worked out for everyone. But the large flocks still haunt the piazzas in Florence and Venice, the squares in London, and similar places in nearly every city across the globe. Despite their ability to distinguish between a Van Gogh and a Chagall, pigeons still deposit droppings that deface the great marble statues and facades–the works of art and architecture that are part of our human heritage–and yet people still buy bags of seed for about a dollar and pose for photographs, drenched in doves. Meanwhile, officials in these cities continue, sometimes quietly, to wage war against the birds (“Introduction”).

Here, Ballenger seems to be saying that in spite of the attempts of so many to rid themselves of the pigeons, others are still drawn to them and will feed them and encourage them to come back. His main idea seems to be that the battle against pigeons is a losing proposition, but he doesn’t come out and say so. His message in this paragraph is implied. Do you think this paragraph would be improved with an explicit topic sentence?

EXERCISE 1: Identify the Topic and Focus

Choose a piece of writing, perhaps an essay or some news articles found online, and for each paragraph identify (1) the topic and (2) the more focused idea. Remember, the topic sentence applies more focus to the broader topic to help narrow the scope of the paragraph. For example, the topic of a paragraph might be school lunches. The more focused idea of that same paragraph might be the idea of having students plant school gardens as a way to help incorporate more fresh produce in the menu.

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CC licensed content, Previously shared:

Basic Reading and Writing. Authored by: Lumen. Located at:  https://human.libretexts.org/Bookshelves/Composition/Book:_Basic_Reading_and_Writing_(Lumen)/ Module_2:_Critical_Reading/2.05:_Identifying_Thesis_Statements   License: CC BY: Attribution.

Adaptions: Reformatted, some content removed to fit a broader audience.

• Locating and Evaluating Thesis Statements

The following video offers a definition of thesis statements, and guidance for finding thesis statements as you read.

Pay attention to the difference between explicit thesis statements and implicit (or implied ) thesis statements .

(This video was made for a specific class, so it will make references to assignments that won’t apply to you. You can also stop watching at 6:00, since the video then proceeds to writing thesis statements, which is not our focus at the moment.)

• Video: Locating and Evaluating Thesis Statements. Provided by : Lumen Learning. License : CC BY: Attribution
• Locating, Evaluating, & Writing Thesis Statements. Authored by : H Ortiz. Located at : https://youtu.be/8a0T_ySxda8 . License : All Rights Reserved . License Terms : Standard YouTube License
• Table of Contents

Instructor Resources (available upon sign-in)

• Overview of Instructor Resources
• Quiz Survey

Reading: Types of Reading Material

• Introduction to Reading
• Outcome: Types of Reading Material
• Characteristics of Texts, Part 1
• Characteristics of Texts, Part 2
• Characteristics of Texts, Part 3
• Characteristics of Texts, Conclusion
• Self Check: Types of Writing

Reading: Reading Strategies

• Outcome: Reading Strategies
• The Rhetorical Situation
• Academic Reading Strategies
• Self Check: Reading Strategies

Reading: Specialized Reading Strategies

• Outcome: Specialized Reading Strategies
• Online Reading Comprehension
• How to Read Effectively in Math
• How to Read Effectively in the Social Sciences
• How to Read Effectively in the Sciences
• 5 Step Approach for Reading Charts and Graphs
• Self Check: Specialized Reading Strategies

Reading: Vocabulary

• Outcome: Vocabulary
• Strategies to Improve Your Vocabulary
• Using Context Clues
• The Relationship Between Reading and Vocabulary
• Self Check: Vocabulary

Reading: Thesis

• Outcome: Thesis
• The Organizational Statement
• Self Check: Thesis

Reading: Supporting Claims

• Outcome: Supporting Claims
• Types of Support
• Supporting Claims
• Self Check: Supporting Claims

Reading: Logic and Structure

• Outcome: Logic and Structure
• Rhetorical Modes
• Inductive and Deductive Reasoning
• Diagramming and Evaluating Arguments
• Logical Fallacies
• Evaluating Appeals to Ethos, Logos, and Pathos
• Self Check: Logic and Structure

Reading: Summary Skills

• Outcome: Summary Skills
• How to Annotate
• Paraphrasing
• Quote Bombs
• Summary Writing
• Self Check: Summary Skills
• Conclusion to Reading

Writing Process: Topic Selection

• Introduction to Writing Process
• Outcome: Topic Selection
• Starting a Paper
• Choosing and Developing Topics
• Back to the Future of Topics
• Developing Your Topic
• Self Check: Topic Selection

Writing Process: Prewriting

• Outcome: Prewriting
• Prewriting Strategies for Diverse Learners
• Rhetorical Context
• Working Thesis Statements
• Self Check: Prewriting

Writing Process: Finding Evidence

• Outcome: Finding Evidence
• Using Personal Examples
• Performing Background Research
• Listening to Sources, Talking to Sources
• Self Check: Finding Evidence

Writing Process: Organizing

• Outcome: Organizing
• Moving Beyond the Five-Paragraph Theme
• Introduction to Argument
• The Three-Story Thesis
• Organically Structured Arguments
• Logic and Structure
• The Perfect Paragraph
• Introductions and Conclusions
• Self Check: Organizing

Writing Process: Drafting

• Outcome: Drafting
• From Outlining to Drafting
• Flash Drafts
• Self Check: Drafting

Writing Process: Revising

• Outcome: Revising
• Seeking Input from Others
• Responding to Input from Others
• The Art of Re-Seeing
• Higher Order Concerns
• Self Check: Revising

Writing Process: Proofreading

• Outcome: Proofreading
• Lower Order Concerns
• Proofreading Advice
• "Correctness" in Writing
• The Importance of Spelling
• Punctuation Concerns
• Self Check: Proofreading
• Conclusion to Writing Process

Research Process: Finding Sources

• Introduction to Research Process
• Outcome: Finding Sources
• The Research Process
• Finding Sources
• What are Scholarly Articles?
• Finding Scholarly Articles and Using Databases
• Database Searching
• Advanced Search Strategies
• Preliminary Research Strategies
• Reading and Using Scholarly Sources
• Self Check: Finding Sources

Research Process: Source Analysis

• Outcome: Source Analysis
• Evaluating Sources
• CRAAP Analysis
• Evaluating Websites
• Synthesizing Sources
• Self Check: Source Analysis

Research Process: Writing Ethically

• Outcome: Writing Ethically
• Academic Integrity
• Defining Plagiarism
• Avoiding Plagiarism
• Using Sources in Your Writing
• Self Check: Writing Ethically

Research Process: MLA Documentation

• Introduction to MLA Documentation
• Outcome: MLA Documentation
• MLA Document Formatting
• MLA Works Cited
• Creating MLA Citations
• MLA In-Text Citations
• Self Check: MLA Documentation
• Conclusion to Research Process

Grammar: Nouns and Pronouns

• Introduction to Grammar
• Outcome: Nouns and Pronouns
• Pronoun Cases and Types
• Pronoun Antecedents
• Try It: Nouns and Pronouns
• Self Check: Nouns and Pronouns

Grammar: Verbs

• Outcome: Verbs
• Verb Tenses and Agreement
• Non-Finite Verbs
• Complex Verb Tenses
• Try It: Verbs
• Self Check: Verbs

Grammar: Other Parts of Speech

• Outcome: Other Parts of Speech
• Comparing Adjectives and Adverbs
• Adjectives and Adverbs
• Conjunctions
• Prepositions
• Try It: Other Parts of Speech
• Self Check: Other Parts of Speech

Grammar: Punctuation

• Outcome: Punctuation
• End Punctuation
• Hyphens and Dashes
• Apostrophes and Quotation Marks
• Brackets, Parentheses, and Ellipses
• Semicolons and Colons
• Try It: Punctuation
• Self Check: Punctuation

Grammar: Sentence Structure

• Outcome: Sentence Structure
• Parts of a Sentence
• Common Sentence Structures
• Run-on Sentences
• Sentence Fragments
• Parallel Structure
• Try It: Sentence Structure
• Self Check: Sentence Structure

Grammar: Voice

• Outcome: Voice
• Active and Passive Voice
• Using the Passive Voice
• Conclusion to Grammar
• Try It: Voice
• Self Check: Voice

Success Skills

• Introduction to Success Skills
• Habits for Success
• Critical Thinking
• Time Management
• Writing in College
• Computer-Based Writing
• Conclusion to Success Skills

Research Writing Process (Book)

Find the following links to be useful in learning about the research writing process., writing a thesis statement, open thesis vs. closed thesis.

Open Thesis vs. Closed Thesis

Implicit Thesis vs. Explicit Thesis

The thesis is a declarative sentence. It is a clear, specific statement, which states the main point of a the paper, thereby limiting the topic and indicating the researcher’s approach to the topic. For this research paper we will be discussing the difference between the open (implicit) thesis approach, and the closed (explicit) thesis. Open (implicit) thesis: Let’s say you are writing a paper on the relationship between the United States criminal court system and the media. You have read on article related to this topic, but you have not yet begun your research. Still, it is possible for you to arrive at a very basic and general opinion without going into detail, secondary topics, or supporting reasons for your assertion. Broad Topic:  The United States criminal court system and the media. Example of an open (implicit) thesis statement: The media plays too influential a role in criminal court trials. To assist you in formulating your preliminary thesis, ask basic “W” questions that are related to your topic: who, what, when, where, and why? This will help you determine your particular interests and a possible starting point for your research. Based on the topic above, the following list demonstrates the different kinds of questions that can be generated. *Why is the media involved in court cases? *When did the media start reporting court cases? *What is the media’s role in criminal court cases? *What aspects of the media am I going to write about? *What kind of criminal case is it? *When did the case take place? *Where did the case take place? *Who were the people involved in the case? If you are writing a research paper and you have come up with a long list of random questions, select three or four questions that hold the most interest for you. These questions will narrow your focus and help you to plan your research strategy.

Closed (Explicit) Thesis: If you make an assertion and include the reason or reasons which support your assertion, and it is broad enough in scope, yet specific enough to be unified and to perform as a substantial generalization of your essay, you have written a closed thesis statement. The evidence can take many forms: facts, opinions, anecdotes, statistics, analogies, etc., but the essential relationship between the thesis and the major points of support is one of conclusion to reason:   This is believed to be true because… (reasons). Broad Topic:  The United States criminal court system and the media. Example of a closed (explicit) thesis: The media plays a very influential role in criminal court trials because of their access to the people, their bias, and because of the special privileges. Based on the topic that YOU have chosen, ask yourself basic “W” questions that are related to YOUR topic to help you plan your research strategy and form a thesis. (Written by Lisa Tolhurst for the Hunter College Reading/Writing Center, 1998) WHY – WHEN – WHAT – WHERE – WHO – HOW – KEEP GOING!.....

“Explicit” vs. “Implicit”: What’s The Difference?

• Difference Between Explicit Vs. Implicit
• Implicit Vs. Explicit Memory
• Implicit Vs. Explicit Costs

The words explicit and implicit can be easily confused. They sound similar, have the same ending, and are both abstract. Adding on to that, both words have multiple meanings—sometimes they’re opposites, and sometimes they simply mean different things.

In this article, we’ll explain the different ways these two words are used, including which one means “implied” and which one means “expressed directly.” Don’t worry, we’ll be explicit in our explanation.

⚡ Quick summary

The main senses of explicit and implicit are opposites. Explicit describes something as being expressed directly without anything being implied. Implicit describes things in which a meaning is implied or hinted at rather than being expressed directly. Explicit and implicit also have other specific meanings that are not necessarily opposites.

What is the difference between explicit vs. implicit ?

The adjective explicit describes something that has been expressed directly. For example, saying We gave them explicit instructions means that the instructions were stated in detail. Something that’s described as explicit doesn’t leave anything up to interpretation.

In contrast, the adjective implicit describes something that has been implied —meaning it has been suggested or hinted at but not actually directly stated or expressed. For example, saying We had an implicit agreement means that the agreement was implied but never actually stated or written down.

These senses of explicit and implicit are direct opposites. Consider the difference between these two statements:

• Don’t press that button—it will give you an electric shock.
• I wouldn’t press that button if I were you.

Statement 1 is an explicit warning. The speaker is clearly and directly telling you not to press the button and what will happen if you do. Statement 2 is an implicit warning. The speaker isn’t outright telling you not to press the button, nor do they say what exactly will happen if you. Rather, they are insinuating —implying, hinting—that something bad will happen if you press the button.

Directly related to explicit is the verb explicate , which means the same thing as explain. On the other hand, implicit is related to the verb imply , meaning “to suggest something without saying it.”

How to tell the difference between similes and metaphors.

To remember the difference, remember that the ex- in explicit comes from the prefix meaning “out,” and the im- in implicit comes from the prefix meaning “in.” If something’s explicit , a person comes right out and says it; if something’s implicit , the true meaning is in someone’s head.

The words explicit and implicit also have other senses that are used in particular contexts. For example, the word explicit can mean that something has sexual or inappropriate content, as in explicit lyrics or This interview features explicit language .

The word implicit can also mean “unquestioning or unreserved,” which is how it’s used in phrases like implicit trust and implicit obedience . Sometimes, it means “inherent.” This is how it’s used in the phrase implicit bias , which refers to a prejudice that someone has without knowing it.

It can be easy to confuse implicit and explicit because they are often used in the same contexts, or even alongside each other. Let’s look at a few specific situations to see the difference.

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implicit vs. explicit memory

In psychology and the study of memory, the words implicit and explicit are used to describe two different kinds of memory. Explicit memory refers to information that takes effort to remember—the kind we need to think hard about to dig out of our memory bank. Implicit memory , on the other hand, refers to information we can recall very easily or even unconsciously.

For most people, things considered part of implicit memory include knowing how to tie your shoes, knowing how to read, or knowing where you live. Typically, you can remember these things without even having to think about them.

In contrast, examples of explicit memory include dates of historical events, times for scheduled appointments, and passwords. Most of the time, you need to actively think about these things (at least a little bit) in order to correctly recall them.

implicit vs. explicit costs

In finance and economics, implicit and explicit are used in the terms implicit costs and explicit costs .

Of the two, explicit costs are easier to understand. These are costs expressly documented as such by a company. Explicit costs include things like employee salaries, repairs, utility bills, debt payments, land purchases, and so on.

Implicit costs are less direct. These are the undocumented costs that a business experiences as the result of something happening. For example, a company might close a store for a day in order to clean it. While this closure may not cost the company money as it is recorded on a balance sheet, it does have an implicit cost : lost sales. As another example, a business may have a manager train a new employee. The company of course pays the explicit cost of the manager’s salary, but there is also the unrecorded implicit cost of time, productivity, and profit considered to be lost during the time taken away from the manager’s main job.

What do you know about the difference between inductive and deductive reasoning?

Commonly Confused

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Resources: Discussions and Assignments

Module 3 discussion: thesis statements and supporting claims assignment.

Select a reading from  The Conversation website . Use the categories at the top of the page or the search bar to find something that sounds interesting to you. Include the URL to the website in your post.

First, read through the article and get a feel for what it’s about. Write a sentence about the main message of the article. After writing this sentence, go back to the text. Is there a sentence in the text that says something very similar to what you wrote down? This is likely the thesis statement.

STEP 1 : Identify this reading’s thesis. Is it an explicit or implicit thesis? If it’s explicit, include the sentence from the text as a quote that you identify as the thesis. If it’s implicit, describe why you feel the author chose not to put an explicit thesis in the work. Describe your thoughts about it—is it a good thesis statement?

STEP 2 : Next, write a paragraph that describes how the thesis relates to the topic sentences of at least two of the paragraphs. Include 2 topic sentences as quotes, and explain each’s relationship to the thesis.

STEP 3 : Write a paragraph that identifies the type of support that each paragraph from the reading uses to reinforce each of those 2 topic sentences. Are they narrative or personal examples? Are they facts or statistics? Are they quotes or paraphrases from research materials? What makes them effective or ineffective?

STEP 4 : Respond in a separate post to at least one classmate (in at least 75 words). Explicitly address their examples and try to extend, complicate, or redirect their points in a substantive, knowledge-demonstrating way. Be sure to cite relevant concepts and key terms from the module.

• Assignment: Thesis. Provided by : Lumen Learning. License : CC BY: Attribution