That's what Brad Childress has told New England reporters during his weekly conference call with the media members of the opposing team.
Childress has said at least once that if Favre doesn't practice this week, he's not going to play on Sunday. Every practice that #4 misses at this point is another step closer to the re-emergence of the Tarvaris Jackson era in Minnesota.
Favre is having his weekly press conference as we speak. He's wearing a walking boot on his foot, and has said that he'd "love to give it a try" on Sunday. The odds of that happening, however, appear to be getting increasingly slim.
If Favre can't practice for the Vikings, however, there's no way he should be out on the field on Sunday.