|(O)| |
|---|---|---|---| There is no Conclusion.
| | |(O)| |
| .---|---. |
| (I) |
.---------------.

.---------------. .-------.
10. All x are m; |(O) | (O)| |(I)|(O)|
All y' are m'. | .---|---. | |---|---|
| |(I)|(O)| | | |(I)|
|---|---|---|---| .-------.
| | |(O)| |
| .---|---. | .'. All x are y;
| | (I)| All y' are x'.
.---------------.

.---------------.
11. No m are x; | | |
All y' are m'. | .---|---. |
| |(O)|(O)| |
|---|---|---|(I)| There is no Conclusion.
| | |(O)| |
| .---|---. |
| | |
.---------------.

.---------------. .-------.
12. No x are m; |(O) | | |(O)| |
All y are m. | .---|---. | |---|---|
| |(O)|(O)| | |(I)| |
|---|---|---|---| .-------.
| |(I)| | |
| .---|---. | .'. All y are x'.
|(O) | |
.---------------.

_Solutions for Sec. 5, Nos. 1-12._ SL5-A

1. I have been out for a walk;
I am feeling better.

Univ. is "persons"; m = the Class of I's; x = persons who have been out
for a walk; y = persons who are feeling better.

.---------------. .-------.
All m are x; | | | |(I)| |
All m are y. | .---|---. | |---|---|
| |(I)|(O)| | | | |
|---|---|---|---| .-------.
| |(O)|(O)| |
| .---|---. | .'. Some x are y.
| | |
.---------------.

i.e. Somebody, who has been out for a walk, is feeling better.
pg139
2. No one has read the letter but John;
No one, who has _not_ read it, knows what it is about.

Univ. is "persons"; m = persons who have read the letter; x = the Class
of Joh