Re: Concept[T] design question

[zahary]

@Araq, I'm more concerned about surprising matching results than the 
reasoning/implementation details, which I don't expect to be very complicated. 
`complexDisambiguation` is on the very last line of `cmpCandidates` and some of 
the criterias before it doesn't seem important enough to trump the 
"more-specific" rule, but we'll see how things will turn out.