I have a simple problem basically I am unable to understand the meaning of some questions involving or/not, and using comma with and. I have the following questions:
1. What is the meaning of, say:
X does not play football or cricket.
What we can infer from this? Can we say X does not play both of them? Or one of them?
2. How the previous line is different from:
X does not play either football or cricket.
3. If x does not play both of them, why in books such kind of statements are there instead of neither/nor.
4. What is the meaning of:
M and N, who reads newspaper, are not sitting together.
Here, Do M and N, both reads newspaper?
Please clarify these things to me. I am not a native English speaker so I found it very difficult to understand and as in logical reasoning questions these statements are common to see I face lot of problems.
Please also tell me about such more things that can be confusing, may be, provide a link.