THIS IS THE HOLLOW KNIGHT; IT'S A SPECIFIC TITLE FOR THE VESSEL THAT CONTAINS THE INFECTION; YEP; EXACTLY; EVEN IF ALL VESSELS ARE HOLLOW AND CAN BE CONSIDERED KNIGHTS, THEY ARE NOT THE HOLLOW KNIGHT; NAKES SENSE TO ME; SO THE KNIGHT IS NOT THE HOLLOW KNIGHT; THE KNIGHT IS THE HOLLOW KNIGHT BECAUSE HE'S HOLLOW AND CALLED "THE KNIGHT"