Either or Neither in sentence with another negative

I am writing something where I want to say the following: I have never visited either Scotland (n)or England. I couldn’t find information about this on either this site (n)or any other site on Google, including the other questions I found on this site, to answer this question specifically. Most other sources never touch on … Read more

‘the eigenvalues of A are either 0 or 1 or both’. Does that mean Both 0 and 1 are possible?

I was asked the following question in a National level exam whose answer will be ‘the eigenvalues of A are either 0 or 1 or both’. But one option which reads the eigenvalues of A are either 0 or 1 was announced correct by the Exam board. I knew that option meant 0 and 1 … Read more

Neither L nor S lives in either A or B, What is your inference regarding this sentence?

Can “Neither Nor” and “Either Or” appear in the same sentence? If yes, what is your inference regarding the sentence below? “Neither L nor S lives in either A or B” The answer my friend thinks is “No one (i.e L,S) lives in any place that has been mentioned (i.e. A,B)”, But for me, some … Read more

Word usage: “either” or “both”?

Consider the following usages: Either the book and the pen are neither in the pocket nor in the backpack of either Sally or Peter. Both the book and the pen are neither in the pocket nor in the backpack of either Sally or Peter. Both the book and the pen are not in the pocket … Read more

Do comparisons make up a special case for understanding either/or as a logical operator?

This question was prompted by a friend who is a fluent speaker of English but not a native one. Consider the following cases: I either eat the apple or the orange. I eat: apple XOR orange. I eat either the apple or the orange. I eat: apple XOR orange. No difference. Now consider: The banana … Read more

Does “Either must die at the hand of the other” imply both that A can only be killed by B and that B can only be killed by A?

The prophesy made by Professor Trelawney about Harry Potter includes the phrase "Either must die at the hand of the other", speaking of Harry and Lord Voldemort. Does this mean that both Voldemort must be killed by Harry and Harry must be killed by Voldemort? Or merely that one must be killed by the other? … Read more