DeVry PHIL347 Week 4 Homework Assignment

PHIL347

Week 4 Homework Assignment

 

Truth-Table Worksheet (graded, 60
points)

Part 1: 6
points

Part 2: 18 points

Part 3: 20 points

Part 4: 16 points

Total: 60 points

 

Part 1—Four Main Connectors (15
points× 4 = 6 total points)

Instructions

For the four main connectors, complete the
truth tables below

·
For
the purposes of this document, we will use keys common on most computers

·
The
tilde (~) remains the same, but andwill
be represented by &,or will be
represented by V, and If, then will be represented by >

·
Use
capital Tfor true and capital F for false

P	~ P

X	&	Y

X	V	Y

X	>	Y

Part 2—Simple Claims (3
points× 6 = 18 total points)

Instructions

The simple claims below are from the
textbook Exercise 76 (page 167)

·
Designate
a letter to represent each simple claim, and then translate the
truth-functional claims into symbolic forms

·
Be
sure to provide a breakdown on which claims are represented by which letter

Example: People often think that all claims are either facts or opinion

Answer: FÚ O

F =People often think that all claims are facts

O =People often think that all claims are opinions

 

1
If John continues to look haggard, then someone must arrange to take him
to the University Health Center to find out what is wrong

Answer:

 

2 Kestrels are not common in this part of
the country

Answer:

 

3
All students on campus have access to either a desktop computer or
laptop computer

Answer:

 

4 The movie is unsuitable for children unless it
has a G rating

Answer:

 

5 Llamas
are South American ruminants, and bison are North American bovine mammals

Answer:

 

6
You can graduate from this university only if you pass the logical
reasoning class

Answer:

Part 3—Identifying Operator Identification (4
points× 5 = 20 total points)

Instructions

From the textbook Exercise 711 (pages 170–171),
follow the directions for claims below

·
Be
sure to identify the claims represented by the capital letters you have chosen
as well as the type of main operator (ie conjunction, disjunction, negation, or
conditional)

Example:You do not feel safe in the dark, yet your mission is to go into
that cave

 

Answer: ~ S • M conjunction

S = You feel safe in the dark

M = Your mission is to go into that cave

 

1 It is not the case that my car will
start after a rainstorm only if I dry off the battery connections

Answer:

 

2 You will not have a successful business
unless you hire hard-working employees

Answer:

 

3 A
crocodile is neither in the yard nor in the house

Answer:

 

4 Children are strong readers and have
good math skills only if they attend preschool

Answer:

 

5
If you finish all of your dinner, then you will not have room for
dessert

Answer:

 

 

Part 4—Table Completion (4
points × 4 = 16 total points)

Instructions

From the textbook Exercise 720 (pages 181–182),
complete the truth tables for the following arguments, and state if they are
valid or invalid

·
If
invalid, be sure to highlight the line demonstrating that fact

·
The
two columns to the left in red are there to help you make sure you are applying
all values properly

 

1
M
>K

M

K

 

The argument is _____ (Valid or invalid)

 

M	K	M	>	K	/	M	//	K
T	T
T	F
F	T
F	F

 

2
P > Q

Q

P

 

The argument is _____

 

P	Q	P	>	Q	/	Q	//	P
T	T
T	F
F	T
F	F

3 Q

P > Q

P

 

The argument is _____

 

Q	P	Q	/	P	>	Q	//	P
T	T
T	F
F	T
F	F

 

4 A
V B

~ B

A

 

The argument is _____

 

A	B	A	V	B	/	~	B	//	A
T	T
T	F
F	T
F	F