SUMMARY OF INFORMAL FALLACIES
*Fallacies of Relevance (occur when the premises are logically irrelevant to the conclusion)
*Appeal to force: Arguer threatens reader/listener.
*Appeal to pity: Arguer elicits pity from the reader/listener.
*Appeal to the pe

Logic Homework Module 3 (45 pts)
Name _
PART I: Reconstruct the following syllogistic forms, draw the appropriate Venn diagram and use the five rules
for syllogisms to determine if they are valid from Boolean standpoint, conditionally valid for Aristotle

Introduction to Logic
Logic Answers: Venn Diagrams and Fallacies
Licensed under the GFDL
1
Venn Diagrams
Directions: (1) Write out each of the following mood and figures into standard form,
using S and P for the minor and major terms and M for the middle

Logic Homework Module 3 (45 pts)
Name _
PART I: Reconstruct the following syllogistic forms, draw the appropriate Venn diagram and use the five rules
for syllogisms to determine if they are valid from Boolean standpoint, conditionally valid for Aristotle

Logic Homework Module 3 (45 pts)
Name _
PART I: Reconstruct the following syllogistic forms, draw the appropriate Venn diagram and use the five rules
for syllogisms to determine if they are valid from Boolean standpoint, conditionally valid for Aristotle

Frances Albers
Ethics 2100 Winter 2016
For my Term Paper, Im choosing to write about one of the most
controversial issues facing our society today. About sixty-three percent of
Americans believe that this subject is morally acceptable (The Statistics Port

5.4 & 5.5
5.4 Reducing the Number of terms
Categorical syllogism are rarely found in standard
form in ordinary spoken and written expressions.
Sometimes quantifiers, premises or conclusions are
left out.
Sometimes they are chained together into one
sta

Logic Ch. 4
Categorical Propositions
4.5 and 4.7
4.5 The other version
Traditional Square of Opposition
In Ch. 4.3 we adopted the Boolean
standpoint when looking at categorical
propositions and how we interpret
universals.
This section we will adopt the

Modern vs Traditional Square of Opposition.
The difference is that with the modern all we can know is contradiction. The relationship
between A and O, and E and I. Propositions that are contradictions of each other have the
opposite truth value. Thus, if

INFERENCE SHEET-SQUARES OF OPPOSITION
S= Subject term
P=Predicate term
Use of the sign for the non/complement statement (S complement S, etc.)
MODERN SQUARE OF OPPOSITION
(Boolean)
Universal Statements
(A) All S are P
(E) No S are P
TRADITIONAL SQUARE OF