Friday Argument #4 Euthyphros Dilemma
Divine Command Theory df. = Gods commanding us to X is a necessary and sufficient condition of our having a
moral obligation to X.
Key Passage: Is what is pious pious because the gods approve it, or do they approve it
Justification of the Truth Table for Conditionals
Recall the promissory note concerning the third and forth lines of the truth table
If we take conditionals with false antecedents to be false, then we
Hausman Chapter 4.1-3
The Problem of Circularity:
Are we not using normal rules of inference to conclude that those self-same rules are good
Semantics = Logic from the outside. Now sentences are not just positions in an
argumentative game, but items
Friday Argument #1
Key Passage: a man cannot inquire either about what he knows or about what he does not
know for he cannot inquire about what he knows, because he knows it, and in that case is in no
need of inquiry; nor again can he inquire about what h
Hausman Chapter 2.9-10
Two sentences connected by the word or form a compound sentence called a disjunction, and
the two sentences so connected are called disjuncts of the disjunction. We use v to symbolize
Two Senses of Or
Practice Logic Test #1
1. Give the precise definition of a proposition.
2. If it is possible for the premises of an argument to be true and the conclusion false, an
argument is what?
3. Give the precise definition of soundness.
4. How do indu
Test 4 Logic
First order hypothetical
If A and B, then Z. Similar to if not the same as premise of inference.
Second order hypothetical
States a condition under which another hypothetical is true. If C, then if A and B, then Z. Similar
to if not the same
Test 2 Logic
Fill in the following table for statement classification
Tautology- All true
Contradiction- All false
Contingent- Some true, some false
Fill in the following table for relation classification
Same truth valu
A phrase or an expression that seeks to suppress the disagreeable aspects of a term or a
Ex. saying put down instead of saying kill
A phrase or an expression that seeks to highlight or exaggerate the disagree
Pointing to, or demonstrating the thing being defined
Definition by example
Provide specific examples of what a word refers to
Definition by Synonym
Provide a synonym
Specifying the features that a thing possess
Assert or deny relationships between terms or classes
All S are P
No S are P
Some S are P
Some S are not P - particular negative
Logic Test 1
Give the precise definition of an argument. (Your answer should have two parts)
An argument is a series of propositions. These propositions include premises and a conclusion.
Premises are provided as justification for the conclusion.
Fallacy of composition
Someone claims because something is true of parts it is true of the whole. Ex: Look at how cold
this winter is- global warming isn't real.
Fallacy of division
When one makes claims from what is true about the whole and says they are
Occurs when an argument makes no progress beyond its own assumptions, includes circular
arguments, begging the question, and self-sealing arguments,
Begging the question
One of the premises are in the conclusion. An argument begs the question if a
One that may be identified by merely examining the form or structure of an argument. Ex:
denying the antecedent or affirming the consequent (modus morons)
Those that can only be detected by examining the content of the argu
Hausman Chapter 3.5-7
Truth-Tables and Validity: Testing for Validity (or better invalidity)
A truth table presents every possible combination of truth values that the components of an argument may
So, if no line exists on which the premises are tru
Hausman Chapter 3.2-4
Logical Form (this is the first move in our transition from semantics to syntax)
Sentence forms are sentences containing only sentence variables and our truth-functional operators. They are
like formulas in mathematics with p, q, r,
Physicalism df.= Everything that is is material/matter. The thesis that there is no stuff in the universe except what
physics says there is.
Jacksons Thought Experiment: Mary is confined to a black-and-white room, is educated through black
UNIT 1 TEST -PRACTICE
1. Give the precise definition of an argument. (Hint: Your answer should have two parts).
2. True or False? The conclusion of an argument is a proposition.
3. Give the precise definition of deductive validity.
4. Give th
LOGIC 102.04 |Spring 2015 | MWF 12:10-1:00 | Furman Hall 325
Luke.Semrau@gmail.com | Office Hours: TBA
This course is designed to make you a better reasoner, regardless of your
personal, professional, or academic aspirations. Material c
I _, pledge on my honor that I have neither given nor received
unauthorized aid on this examination.
* Assuming Existential Import*
Module 1: Determining Immediate Inferences
The Square of Opposition
1. Draw the Traditional Square of Opposition. G
I _, pledge on my honor that I have neither given nor
received unauthorized aid on this examination.
NO PARTIAL CREDIT.
1. Fill in the following table for statement classification:
Truth-values of main operator
Day 1: Course Introduction
Today we will:
Meet each other.
Answer two questions:
1. Whats the courses purpose?
2. How do I succeed in this course?
Meet the syllabus.
Survey the argument landscape.
I have lived so
Formal: Translations with Conjunction
Argument Analysis: Cultural Relativism
1. Brief Review
2. Central concepts
2. Translation with and
3. Rachels: The Challenge of Cultural Relativism
In each of these arguments Socr
1. Test Tomorrow! Goal: 90% average or better!
2. Direct/Indirect tests
3. Dont forget the other assignment too.
2. Necessary and Sufficient Conditions
3. Review practice test
4. Complex Translations
5. Review Infor
Truth Values & Logical Form
2. Computing Truth Values
3. Logical Form
A and B are true, C and D are false. Q and R
are unknown. What can we say about:
1. (A C) [(D Q) (~A R)]
2. A v ~A
3. (R ~R)