k*******3
发帖数: 1909 | 1 No class on Monday or Wednesday
是周一周三两天都没课,还是周一或周三(一天)没课 |
o********l
发帖数: 12430 | 2 or
does not equal to and
No class on Monday or Wednesday
是周一周三两天都没课,还是周一或周三(一天)没课
【在 k*******3 的大作中提到】
: No class on Monday or Wednesday
: 是周一周三两天都没课,还是周一或周三(一天)没课
|
l***i
发帖数: 632 | 3 not (p or q) = not p and not q
standard logic |
k*******3
发帖数: 1909 | 4 you are wrong.
【在 o********l 的大作中提到】
: or
: does not equal to and
:
: No class on Monday or Wednesday
: 是周一周三两天都没课,还是周一或周三(一天)没课
|
o********l
发帖数: 12430 | 5 or right
【在 k*******3 的大作中提到】
: you are wrong.
|
Y**s
发帖数: 1632 | |
k*******3
发帖数: 1909 | 7 see here: http://niyanfa.siteem.com/common-09/03.htm
含有and连接并列成分的肯定句变为否定句时，应将and改为or，表示前后成分均被否定
；and前后为名词时，也可用no…and no…表示否定，如果and连接的两项内容为一整体
时，则不变。如：
（1）They can speak English and Chinese．→
They can't speak English or Chinese．
【在 o********l 的大作中提到】
: or right
|
O******e
发帖数: 734 | 8 This is a defect in English.
If you are a logician, mathematician, or computer scientist,
you might say one of the following to be clear:
"No class on Monday ior Wednesday."
"No class on Monday xor Wednesday."
I guess this wasn't a class in one of these subjects.
【在 k*******3 的大作中提到】
: No class on Monday or Wednesday
: 是周一周三两天都没课,还是周一或周三(一天)没课
|
l***i
发帖数: 632 | 9 `or' in English is logical, it has the same meaning as in logic
`xor' is `either ... or ...' in English.
【在 O******e 的大作中提到】
: This is a defect in English.
: If you are a logician, mathematician, or computer scientist,
: you might say one of the following to be clear:
: "No class on Monday ior Wednesday."
: "No class on Monday xor Wednesday."
: I guess this wasn't a class in one of these subjects.
|
O******e
发帖数: 734 | 10 "or" in English is not always "inclusive or".
"Are you male or female?" (exclusive or)
"Do you want cream or sugar in your coffee?" (inclusive or)
【在 l***i 的大作中提到】
: `or' in English is logical, it has the same meaning as in logic
: `xor' is `either ... or ...' in English.
|
l***i
发帖数: 632 | 11
It's the question which makes it `exclusive or'...
【在 O******e 的大作中提到】
: "or" in English is not always "inclusive or".
: "Are you male or female?" (exclusive or)
: "Do you want cream or sugar in your coffee?" (inclusive or)
|
O******e
发帖数: 734 | 12 The questions that I gave as examples provide the context
to clarify whether the "or" is inclusive or exclusive, but
the word "or" itself is not always inclusive or always
exclusive. Of course, "either . . . or" is definitely an
exclusive disjunction
Waiter: "What would you like to order?"
Diner: "I'd like to have the fajita."
Waiter: "Do you want chicken or steak?"
In this case it is not necessarily clear what "or" means
unless you have seen the menu and know whether the
restaurant offers chic
【在 l***i 的大作中提到】
:
: It's the question which makes it `exclusive or'...
|
l***i
发帖数: 632 | 13 well, you can always interpret it as `inclusive or'... however, it may `
degenerate' to `exclusive or' depending on the underlying model...
【在 O******e 的大作中提到】
: The questions that I gave as examples provide the context
: to clarify whether the "or" is inclusive or exclusive, but
: the word "or" itself is not always inclusive or always
: exclusive. Of course, "either . . . or" is definitely an
: exclusive disjunction
: Waiter: "What would you like to order?"
: Diner: "I'd like to have the fajita."
: Waiter: "Do you want chicken or steak?"
: In this case it is not necessarily clear what "or" means
: unless you have seen the menu and know whether the
|
