Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
johndoris johndoris
wrote...
Posts: 135
Rep: 0 0
A year ago
Consider this proof, (1.) E • D (2.) ~ (E • D) ≡ O/∴ Ev~O (3.) [~ (E • D) ⊃ O] • [O ⊃ ~ (E • D)] (4.) [O ⊃ ~(E•D)]• [~(E•D) ⊃ O] (5.) O ⊃ ~ (E • D) (6.) ~ ~ (E • D) (7.) ~ O (8.) ~ O v E (9.) E v ~ O What is the justification for line 4?

▸ 3 Simp

▸ 3 Com

▸ 3, 2 HS
Textbook 
How to Think Logically

How to Think Logically


Edition: 2nd
Authors:
Read 50 times
1 Reply
Replies
Answer verified by a subject expert
ssong07ssong07
wrote...
Posts: 105
Rep: 0 0
A year ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

johndoris Author
wrote...

A year ago
Thanks
wrote...

Yesterday
You make an excellent tutor!
wrote...

2 hours ago
Good timing, thanks!
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  853 People Browsing
 107 Signed Up Today
Related Images
  
 117
  
 21
  
 146
Your Opinion