#15 - Local, Except

[Administrator]

Please post your questions below!

[dimi.wassef@yahoo.com]

Is there a breakdown for questions 15-17?

[Robert Carroll]

dimi.wassef,

Questions 16 and 17 have threads already with posts:

viewtopic.php?f=1252&t=16235

viewtopic.php?f=1252&t=16234

For Question 15 here, L cannot be open with R (last rule) and N and R can't both close (first rule). So if L is open, N must be open, which is a global inference that proves why answer choice (B) is correct for this question.

Robert Carroll