The Discovery of Deduction (Classical Academic Press)

The Discovery of Deduction is a Classical Academic Press (CAP) text subtitled An Introduction to Formal Logic. CAP's product page says it teaches how an argument is put together, recommends it for students who have studied informal fallacies such as those in The Art of Argument, and says the text also stands on its own.

Last updated: 2026-10-08 · Every Homeschool Editorial Team

At a glance

Method	Classical, subject-specialist formal logic (Every Homeschool classification)
Worldview	Christian · Ecumenical is Every Homeschool's classification. In its own words, CAP serves both Christian classical schools and homeschools, and its materials are used in classical charter schools that are not religious. The text's Look Inside sample credits Scripture labeled NASB, discusses Thomas Aquinas's use of Aristotle's logic, and lists an appendix on handling religious, moral, and ethical disputes
Grades	Grades 8-9 on CAP's series page and logic page. Scholé Academy's course page says its course is geared toward grades 7-12, and its shop listing says grades 8-12
Formats	Paperback Student Edition (332 pages; CAP's page calls it a consumable item) and Teacher's Edition (360 pages); streaming video, sold digital online only; an Assessments, Quizzes & Extra Practice PDF; a live yearlong course at Scholé Academy
Cost tier	Standard (Every Homeschool classification). Student Edition $31.95, Teacher's Edition $34.95, and Program $169.95 with streaming video, retrieved October 2026
Parent intensity	3 (Every Homeschool rating)
ESA-common	Not verified
Accredited	Not applicable: a curriculum product. Scholé Academy, which teaches a live course on the text, states that its courses are not accredited by an external agency
Established	The Look Inside sample's copyright page reads 2009 and is labeled Version 2.2
Website	classicalacademicpress.com

Our scoreboard (1-5)

Criterion	Score	One-line reason
Academic rigor	5	In our assessment, the sample's four units cover terms, propositions, categorical syllogisms, and validity tested by several methods, including counterexamples and Venn diagrams
Ease of teaching	3	In our assessment, a parent teaching formal logic for the first time will find it demanding without help; CAP sells a Teacher's Edition with an answer key and teaching tips, a streaming video of 20+ hours, and a live Scholé Academy course
Content quality	5	In our assessment, the Look Inside sample is carefully organized into units, chapters, lessons, and dialogues; we did not read the full book
Flexibility	4	CAP recommends it for students who have studied informal fallacies and says it also stands on its own
Value for money	4	Student Edition $31.95; the streaming video adds $114.95 (retrieved October 2026)
Worldview scope	4	In our assessment, the sample we read draws on Aristotle and Aquinas and includes an appendix on religious, moral, and ethical disputes; we did not read the full text
Visual/design	4	In our assessment, the sample uses numbered lessons, dialogues, and diagrams in a consistent format; the score reflects the Look Inside sample
Support resources	4	Teacher's Edition, streaming video, an assessments PDF, a free suggested schedule, a links list, a square-of-opposition PDF, and errata (per the product page), an "Ask the Magister" resource where, per that page, homeschooling parents, students, and teachers can ask a question of a teacher, and a live Scholé Academy course

Who the publisher is

The Discovery of Deduction is published by Classical Academic Press. CAP's Our Story page says the company was founded in 2001; see our CAP review for more on the company. The product page lists three contributors as authors: Joelle Hodge, Shelly Johnson, and Aaron G. Larsen, who is also listed as volume editor. The Look Inside sample's title page and the 2026 catalog name the same three people.

CAP's video page names Joelle Hodge, coauthor of the text, as the video instructor.

In its own words, CAP serves both Christian classical schools and homeschools, and its materials are used in classical charter schools that are not religious. Every Homeschool classifies this text as Christian · Ecumenical.

The core pedagogy

The product page says the text teaches how an argument is put together, meaning its form or structure, and that it uses Socratic dialogue, ample discussion, and integration of other subjects. It says students start with a short history of Aristotelian logic, learn to translate arguments from ordinary, conversational, or written narratives into categorical form, then study how to construct syllogisms and test them for validity. It also names the square of opposition, relationships of equivalence, valid propositional inferences, and the analysis of syllogisms.

In the Look Inside sample, the table of contents shows four units and nine chapters:

• Unit I, Introduction: formal and informal logic, deductive and inductive reasoning, categorical and propositional logic (Lesson 1.3), a history of logic, and the three acts of the mind.
• Unit II, Propositions and Their Relationships: translating propositions into categorical form, the square of opposition, and relationships of equivalence.
• Unit III, Categorical Syllogisms: arranging syllogisms, moods and figures, and determining validity by the counterexample method, terminological and qualitative rules, and Venn diagrams.
• Unit IV, Terms and Definitions: definitions and disagreements, types of definitions, and pursuing truth.

The sample's appendices include a syllogism evaluation form, Venn diagrams of valid syllogisms, and "Handling Religious, Moral, and Ethical Disputes."

CAP's FAQ defines formal logic as the study of reasoning that depends primarily on the form or structure of the argument, and describes The Discovery of Deduction as the deductive study. It offers two sequences after The Art of Argument: The Discovery of Deduction and then The Argument Builder, or The Argument Builder directly. CAP's 2026 catalog places The Art of Argument in 7th grade and The Discovery of Deduction in 8th grade.

A day in the life

The publisher's materials describe the following:

• The free suggested schedule is a weekly table that runs 32 weeks and lists two in-class entries for each week, with columns for the in-class lesson or objective, prep notes and additional instructor resources, and homework for students and instructors. It refers to the text's worksheets and "Deduction in Action" projects.
• The streaming video offers chapter-by-chapter lessons taught by Joelle Hodge, with 20+ hours of high-definition footage. The page says homeschoolers keep streaming access for the life of the product.
• Scholé Academy's shop listing gives a live yearlong 2026-27 course meeting twice a week for 60-75 minutes. Its course page says students read Mere Christianity at the end of the second semester, and lists as prerequisites a course in informal logic such as its Art of Argument course, completion of Pre-Algebra, and experience with outlining, thesis-based essays, and MLA style.

What they do exceptionally well

A stated starting point. CAP recommends the text for students who have studied informal fallacies and says it also stands on its own, and Scholé Academy lists prerequisites for its course. In our assessment, a family can see what preparation each path expects.

A defined structure. The sample's table of contents shows four units, nine chapters, dialogues, and numbered lessons, with appendices for evaluating syllogisms. In our assessment, this lets a teacher plan the course and a student find a topic again.

Several supports for the parent. CAP sells a Teacher's Edition with the entire student text plus an answer key, teaching tips, sample essays, dialogues, and arguments; a streaming video; an assessments PDF; and free schedule, links, and square-of-opposition files. In our assessment, this is a wide range of support for a subject many parents have not studied.

Errata. The product page links an errata PDF and a clarification for pages 163-165 of the Teacher's Edition. In our assessment, this lets families check known corrections.

What they do poorly

Demanding without help. CAP's FAQ describes formal logic as the study of reasoning that depends on form or structure. In our assessment, a parent who has not studied logic will find the text demanding without the Teacher's Edition, the video, or a class.

Costs stack. The Student Edition is $31.95, the Teacher's Edition $34.95, and the streaming video $114.95. The Program, which bundles the Student Edition, Teacher's Edition, streaming video, and an assessments PDF, is $169.95 (all prices retrieved October 2026).

Version matters for the live course. The Scholé Academy course page tells students to be sure to get Version 2.2 of the text, and the Look Inside sample is labeled Version 2.2. In our assessment, families buying used copies should check the version.

Who it fits / who it doesn't

• Pick The Discovery of Deduction if: you want a formal logic text for the grades CAP lists; your student has studied informal fallacies or you are using the text on its own, as CAP says is possible; you want a Teacher's Edition, a video, or a live class; you are comfortable with a text from a publisher that serves Christian classical schools and homeschools.

• Skip The Discovery of Deduction if: you want an informal fallacies course, for which CAP offers The Art of Argument; you want a program with no teacher support and are not prepared to add video or a class.

Cost honest assessment

All prices below are CAP's, retrieved October 2026.

• Student Edition: $31.95. Teacher's Edition: $34.95. Together, $66.90 (our arithmetic).
• Streaming video: $114.95, digital online only.
• Program: $169.95, which the page says includes the Student Edition, Teacher's Edition, streaming video, and the Assessments, Quizzes & Extra Practice PDF. The PDF is $5.95 on its own.
• Scholé Academy's shop lists the yearlong 2026-27 course at $710. Per Scholé's FAQ, books are sold separately and a $75 deposit is built into the cost of each course. The course page lists the text, Mere Christianity, and the MLA Handbook as required materials.

CAP's FAQ says it does not regularly offer discounts or coupons.

ESA eligibility notes

Every Homeschool has not confirmed whether any state ESA marketplace lists The Discovery of Deduction or Scholé Academy tuition. Scholé Academy's state funding page lists programs for which its students may qualify. Families should confirm with their program administrator that the specific items they plan to buy, including streaming video and live-class tuition, are eligible and whether the program applies restrictions to religious curriculum.

Alternatives

• The Art of Argument, a family would choose CAP's informal logic text if they want the introductory study that CAP's FAQ places before this one.
• The Argument Builder, a family would choose it if they want the pre-rhetoric text that CAP's FAQ offers as the path after The Art of Argument or after this text.
• Memoria Press Traditional Logic, a family would compare it if they want a different publisher's logic text; the publisher states its own scope and prices on its site.
• Canon Press Introductory Logic, a family would compare it if they want a different publisher's logic text; the publisher states its own scope and price on its site.