Forest/Domain functional level confusion

I've come across a few example questions while studying that confuse me.
Technet articles state you cannot lower a domain/forest functional level. fair enough.
However, i've had a few questions where the answer is "have the other domain/forest admin lower the functional level to 2003 interim..." in certain scenarios.
This doesn't really make sense (and I can't quote the exact Q&A as I don't have my texts with me).
Can anyone shed any light on this?
Technet articles state you cannot lower a domain/forest functional level. fair enough.
However, i've had a few questions where the answer is "have the other domain/forest admin lower the functional level to 2003 interim..." in certain scenarios.
This doesn't really make sense (and I can't quote the exact Q&A as I don't have my texts with me).
Can anyone shed any light on this?
Comments
That's what I though, and I doubt an admin is going to do that just so a domain with NT4 DC's can join it...
Weak points were sites, Trusts and software distrib in GPOs
next attempt tomorrow (tuesday)
As for the original question I did some more study...
Domains cannot be lowered without restoring.
Forests can, windows 2003 forest can be lowered to interim apparently.
What I was good at for the first exam I screwed up in the second, what I screwed up in the first I nailed in the second...
Doesn't really make sense hehe
Anyhow, Did the exam again yesterday (3rd attempt).
907
Now to decide which exam to do next...
Oh, don't worry, it makes perfect sense. You take the exam, find out what your weak areas are, then you only focus on those. You forget to review your strengths, then you tank those on the second time around, doing much better on the stuff you'd scored poorly on the first time. (That's why I always tell people "study your weak areas, do a comprehensive review of all the topics, then go back and take the exam.)
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