1 |
No
it is inconsistent. If what he believes were true, Mary's only brother
would have to be David, of course.
|
2 |
No
|
3 |
Yes.
No doubt it is physically impossible for a woman to have so many children,
but things could have been different.
|
4 |
No.
What he believes couldn't have been true. Of course "2"
might have meant something different, and so might "+" and
"=" and "5", so that the sentence "2+2=5"
could have been used to say something true. But what Peter is said
to believe is that 2+2=5; this is not the same thing as saying that
Peter believes that "2+2=5" means something which is true.
|
5 |
No,
if they are referring to the same person and the same day. Otherwise,
yes.
|
6 |
Answer.
No if Mary is referring to John and is talking about the same time.
Otherwise, yes.
|
7 |
No,
if Marmaduke is being used to refer to the same thing in both sentences
(on the assumption that nothing could be both a cat and a man, even
at different times). Otherwise, yes.
|
8 |
Yes,
whether or not the same person is being referred to. There is no impossibility
in being both. |