Skip to ContentGo to accessibility page

Review Questions

5.1 Philosophical Methods for Discovering Truth

1 .
What is the general structure of a dialectic?
2 .
What is a statement?
3 .
Offer an example of a statement and its negation.
4 .
How does the law of noncontradiction logically imply the law of the excluded middle?

5.2 Logical Statements

5 .
Offer an example of a conditional, then identify the necessary and sufficient conditions expressed by it.
6 .
What is a counterexample?
7 .
Consider the following conditional: “If you walk in the rain, your shirt will get wet.” What is a possible counterexample to this statement?
8 .
Consider the following universal affirmative statement: “All games involve a winner and a loser.” What is a counterexample to this statement?

5.3 Arguments

9 .
What is an argument?
10 .
What are the key components of an argument?
11 .
Consider the following argument: “Since Jori is allergic to cats and her apartment complex does not allow dogs, it must be the case that Jori does not have a pet.” What are the premises of this argument, and what is the conclusion? What words in the argument indicate the premises and conclusion?
12 .
Explain the difference between a logical analysis and a truth analysis of an argument.

5.4 Types of Inferences

13 .
What makes a deductive argument valid, and how can you test for validity?
14 .
Explain inductive inference, and describe how it is different from an abductive inference.
15 .
How is reasoning from specific instances to generalizations similar to reasoning from the past to the future?
16 .
Explain abductive inference and describe how it is similar to an inductive inference.

5.5 Informal Fallacies

17 .
What are the four general categories of informal fallacies?
18 .
What is the difference between fallacies of relevance and fallacies of weak induction?
19 .
What is problematic with appealing to emotion in an argument, and how does this qualify it as a fallacy of relevance?
20 .
Explain what a fallacy of unwarranted assumption is, and offer an example of one.
Citation/Attribution
Reuse and redistribution of this content in digital or print format:
  • This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's prior written permission.
  • This book uses the Creative Commons Attribution-NonCommercial-ShareAlike License, which means that you can reuse and modify the material only for noncommercial purposes, must attribute OpenStax, and must distribute any derivative works under the same license.
  • Any commercial printing of this textbook, including using a local or custom printer, must be approved by OpenStax, and proper citation provided.
  • OpenStax-copyrighted images, activities, assessments, and similar components of this book are subject to the same licensing – CC-BY-NC-SA. They can be used for noncommercial purposes with attribution. Commercial use requires permission.
  • Permission requests: Anyone who intends to incorporate this content (including text, images, and other components) into large language models, use it in AI offerings, use it commercially (including in print), and/or has questions about another use case is welcome to complete our reuse request form.
Attribution information
  • If you are redistributing all or part of this book in a noncommercial print format, then you must include on every physical page the following attribution:

    Access for free at https://openstax.org/books/introduction-philosophy/pages/1-introduction

  • If you are redistributing all or part of this book in a noncommercial digital format, then for every page that includes OpenStax content, you must license the derivative work under the same CC-BY-NC-SA license as the original, and include on every digital page view the following attribution:

    Access for free at https://openstax.org/books/introduction-philosophy/pages/1-introduction

Citation information

The information below includes the information needed to generate citations in most major styles (APA, MLA, etc.); you must reformat and organize the information as needed to fit the requirements of the style. Use the information below to generate a citation. We recommend using a citation tool such as this one.

© Apr 23, 2026 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike License. The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo, and Rice University name, and Rice University logo trademarks, or wordmarks are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.