help! one Game Question Forum

[mason.zh]

For pt 44, section 3, questions 13...17.

"The site visited third dates from a more recent century than does either the site visited first or that visited fourth."

How do you guys interpret the "either...or" in the question stem? Does it necessarily mean that the site visited third dates more recent than both the first and the forth? Since the bible and kaplan explanation both crack the question in this way and I was really confused. It seems to me there are other alternative possibilities such as " more recent than one of them but not both"......

Any one could shed light on it?

[t14fanboy]

Both the first AND fourth have to be older than the third.