Have a question about our books, syllabus, etc.? Ask away...
 
DavidH327
Thanks Received: 1
Vinny Gambini
Vinny Gambini
 
Posts: 24
Joined: December 17th, 2017
 
 
 

5th edition

by DavidH327 Sat Dec 23, 2017 4:53 pm

On pg372 #1 and #3 shouldnt answers be C (none of the above)?
1 says some A and some B
3 says most A and some B

Instead Answer (p374) suggest
1.B (some B some A)
3. B (some A some B)
User avatar
 
ohthatpatrick
Thanks Received: 3804
Atticus Finch
Atticus Finch
 
Posts: 4661
Joined: April 01st, 2011
 
This post thanked 1 time.
 
 

Re: 5th edition

by ohthatpatrick Mon Jan 01, 2018 8:17 pm

(Sorry for the holiday delay!)

The inferences look solid to me.

“Some” = at least one
“Most” = more than 50%

If we say
#1 … some A’s are B
“at least one clown’s name is Eddie”
then it has to be true that some B's are A
“at least one person named Eddie is a clown”

And if we say
#3 …. Most A’s are B
“more than 50% of cats have fur”
then it has to be true that some A's are B
“at least one cat has fur”

Is there any part of that you disagree with?