I have a feeling that it hasn't really been, or will be hard for McD to decide. He likely was feeling alright early in the week, in protocol still of course. It is absurd to think if he's taking reps with ones and has cleared protocol, which sounds likely to happen, he won't start. McDermott is no fool, he knows he's under no obligation to make it any easier for the Titans by announcing they expect him to play.
How do we know he's been tested today?