Silkies and yorkies are two different breeds. From what I understand, yorkies were bred down from silkies but AKC has classified them as two different breeds.
Here's the links to AKC...
Silky
http://www.akc.org/breeds/silky_terrier/index.cfm
Yorkie
http://www.akc.org/breeds/yorkshire_terrier/index.cfm
And no, there aren't any stupid questions...
