Harry Potter thought: it's been a long time since I actually sat down and read the book so there could be something I'm forgetting here but wouldn't it have made sense to like... just not let Harry participate in the Triwizard Tournament? like his professors would know that he's generally not a malicious liar and troublemaker and there's plenty of evidence that shenanigans were at play in getting his name in the Goblet of Fire. it seems like it'd be a lot more sensible to just go "yep we're disqualifying you from competing because this doesn't add up" than to put him in just because he's Harry Potter. this whole plot could have been avoided.