The document is a summary of the book 'Logical Communication Skill Training' by Sean Yamasaki, which focuses on training individuals in logical thinking for effective communication. It covers key components of conveying messages in business and includes techniques for organizing thoughts, avoiding common failures, and mastering different logic patterns. The training is currently only available in a Japanese edition and is aimed at enhancing clarity and persuasiveness in communication.

1. Summary of
“Logical Communication
Skill Training”
Sean Yamasaki
2020/05/15

2. Book Information
• Simple and clear training book of Logical
thinking.
• Only Japanese Edition has been released
• Written by Hanako Teruya and Keiko Okada
• ISBN-10: 9784492531129
• ISBN-13: 978-4492531129
• Publisher: Toyo Keizai Shinpo-Sha
(東洋経済新報社)

3. Contents
• [Part1] Before you write or speak
• [ch1] To tell “message” to other person
• [ch2] Common Failures of unpersuasive “Answer”
• [Part2] Technics to logically organize thought
• [ch3] Avoiding “Duplicity”, “Leak” and “Different Level”
• [ch4] Avoiding “Leap in a logic”
• [Part3] Technics to logically compose
• [ch5] Compose Logic with “So What? / Why So?” and MECE
• [ch6] Logic Pattern Types
• [ch7] To Master Logic Patterns

4. [ch1] To tell “message” to other person
• In a business scene, we should tell “Message"
• [Def] "Message" consists of three components and sub components
• THEME: topics we should discuss to solve our problems. We should always remind what the
theme is.
• ANSWER: the opinion about the defined theme. ANSWER consists of CONCLUSION,
EVIDENCES and METHOD.
• CONCLUSION: the summary of ANSWER
• EVIDENCES: which supports CONCLUSION
• METHOD: if we need them to react, we should prepare concrete methods to take actions
• EXPECTED REACTION: the goal of the conversation.
(1) THEME
(2) ANSWER
(2.1) CONCLUSION
(2.2) EVIDENCES
(2.3) METHOD
(3) EXPECTED REACTION
Elements of Message

5. [ch2] Common Failures of unpersuasive “Answer”
• Failed Conclusions (2.1)
• 1. Conclusion is not "What I want to say", it should be "Summary of the answer for the
theme”
• 2. Removing ambiguous expression (depends on situation, cases, etc.)
• Failed Evidences (2.2)
• 1. "We need A because we don't have A" does not work
• 2. Confusion with "Fact" and “opinion"
• 3. Removing Evaluation Criteria
• Failed Methods (2.3)
• 1. Too abstract method which can be adapted to other company doesn't work
• 2. Too many “abjectives" (without concrete words)
• Failed Answers(2) (how to integrate conclusion, evidences and methods)
• 1. Duplicity / Leak / Different Level
• 2. Leap in Logic
(1) THEME
(2) ANSWER
(2.1) CONCLUSION
(2.2) EVIDENCES
(2.3) METHOD
(3) EXPECTED REACTION
Elements of Message

6. [ch3] Avoiding “Duplicity”, “Leak” and “Different Level”
• It's important to clearly grasp "Whole Set" and consisting "Part Set”
• MECE: Mutually Exclusive and Collectively Exhaustive
• MECE is the technic of which you can show whole set and important part subsets
to make the audience think easily.
• MECE is two types
• (type1) Completely Exhaustive (age, gender, etc.)
• (type2) Widely Accepted Framework
• Examples of type2
• 3C/4C: Customer, Competitor, Company, (Channel)
• 4P: Product, Price, Place, Promotion (already target customer has been
cleared)
• Steps or Flow from beginning to the end
• Efficiency / Effect
• Quality / Quantity
• Fact / Opinion
• Grouping: to organize and make it easy to grasp whole concepts with MECE
categories

7. [ch4] Avoiding “Leap in a logic”
• So What?: the work of extracting important sentence from known information or
materials.
• Why So?: the work of checking if the extracted sentence is supported by
evidences.
• Important habits
• (1) Always Thinking of "So What?”
• (2) Always check with "Why So?" whenever think "So What?”
• "So What?/Why So?” has two types
• (type1) OBSERVATION: Extracting same type sentence
(Fact to Fact, Action to Action)
• (type2) INSIGHT: Extracting different message (Hypothesis, rules, etc.)

8. [ch5] Compose Logic with “So What? / Why So?” and
• "Logic" is consists of CONCLUSION and multiple EVIDENCES or METHODS
where CONCLUSION is the top and vertical relation is made with "So What? /
Why So?" and horizontal relation is made with MECE.
• "Logic"'s three requirements
• 1. CONCLUSION is the ANSWER for THEME
• 2. There is "So What? / Why So?" relation vertically
• 3. There is MECE among multiple elements horizontally
• Compact "Logic" is better. You should give minimum information for the audience
• The maximum number of elements in a MECE relation is four or five.
CONCLUSION
THEME
A B C
So What?
Why So?
MECE

9. [ch6] Logic Pattern Types
• There is two basic “Logic” patterns
• 1. Parallel Structure
• 2. Explanation Structure
• Parallel Structure: There is no dependencies between each elements.
• Explanation Structure: consists of three evidences, FACT(objective),
CRITERIA(subjective) and DECISION(subjective).
• With Explanation Structure, we can emphasize our thinking pattern.
CONCLUSION
THEME
A
So What? Why So?
MECE
B C
CONCLUSION
THEME
FACT
So What? Why So?
MECE
CRITERIA DECISION
Objective Subjective Subjective
Parallel Structure Explanation Structure

10. [ch7] To Master Logic Patterns
• In a business scene, we often encounter the case where we want to tell two
THEMEs
• 1. Whole Direction
• 2. Concrete Actions
• There are four combinations of two “Logics”
Whole Direction
Concrete
Actions
Advantage Disadvantage
Parallel Parallel
Simple + Compact CRITERIA is hidden
Explanation Parallel
Synchronize the whole
direction with audience
Still Compact
CRITERIA behind Concrete
Actions is hidden
Parallel Explanation
Synchronize the Concrete
Actions with audience
Still Compact
CRITERIA behind whole
direction is hidden
Explanation Explanation
Synchronize both THEME
with Audience
Massive. should divide
meeting two times.