I understand the blues now.

"Were this classical music being discussed, the dominant (major-minor) seventh chord on the tonic would almost certainly resolve elsewhere (rather than being resolved to), especially its subdominant (from C7: to F). While, at first, it seems to resolve well to the subdominant, this is merely a tonicization (brief leave to another key), because of the earlier emphasis on the dominant seventh (C7), and because of the dominant seventh that appears on the subdominant, an element found in the Dorian mode."

Now we can all go out for a beer.