oanhnguyen1116
Hi
chetan2u,
Thank you so much for your reply. I am not good at grammar, so my question seems akward

Back to the question, when I read the question, I do not determine whether it requires "all" criteria or each of them.
Could you make it clear? Thank you.
Dear
oanhnguyen1116I'm happy to respond.

Think about it this way.
The construction "
A, B, and C" means one and only one thing: a set with all three of those items included, {A, B, C}.
Because in math & logic, the word "
or" is always the
inclusive OR, the construction "
A, B, or C" includes seven different cases:
1) {A}
2) {B}
3) {C}
4) {A, B}
5) {A, C}
6) (B, C}
7) {A, B, C}
Now in this example, let
A = a walk
B = a hit
C = reaching base some other way
In a "perfect game," none of these things happens. Of the two lists above, which is a complete list of the not allowed things in a "perfect game"? Of course, it's not the single possibility of the "AND" list---it's the seven cases of the "OR" list.
Technically, logically, "not A, B, and C" means that any of three would be allowed individually, that any pair would be fine, and that the only single thing not allowed would be the combination of all three. By contrast, "not A, B, or C" means that no one is allowed and they are not allowed in any combination.
Does all this make sense?
Mike