Murphy must be wrong!

I found this site about various variants of Murphy's applying to many professions and areas.
http://userpage.chemie.fu-berlin.de/diverse/murphy/murphy2.html
Bit surprising that there is no Murphy's variant for audit. So here's one:
'The exception is always in the sample you do not select'
Its friday night and I am really in best of my moods, I thought of disprooving Murphy's law. I want it to be worng. However there is absolutely nothing on the net I could find.
Which makes me beleive, its not that this law can't be disproved, people do not wan to disprove it. Cause its convinient !!!
The best I could come up with is:
If anything that can go worng, goes wrong..This should hold true for Murphy's law true.