They must have been "easy" ones. I have completed 17 WU but have 10X the points you do

(j/k) so the ones I completed must have counted for more than the ones you did. I'm pretty sure that's how it works. What I don't know is how it assigns the WU's in the first place.
Does the server assign different WU's to different computers based on some measure of system performance? My comps are certainly not high powered - they're just on all the time.
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If there are lawyers or politicians involved, logic may be a very poor tool for reaching a conclusion.