I'm sure Kweli is far from stupid. If he's going to rock a Dre beat, don't you think he'll make sure shit's correct??? I have confidence in the brother. He has demonstrated time and time that he has lyrical skill. He just wouldn't drop a verse on any bullshit just to say "I did a song with Dre!?"
Have some kind of faith in the artist. Kweli has come correct in the past. He can do it again.