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Claudius Debate: i think one of the big issues here is that once a referee has leaned in and given a decision (penalty, red card), we rarely see him reverse it due to this idea that "we do not want to re-referee the game". that's incredibly stupid. you've spent millions on technology and extra eyes. use it, and create an environment where it's okay to tell the leader that "hey, you got it wrong, we are going to reverse your decision". and also lean on data to encourage referees to take a second look.
Absolutely this. The point of it should be to ensure the correct decision, not to back up the mate in the middle. We're all human and you can't get everything right in real time, that's why the technology should be there. Football could learn a lot from how it works in say cricket or rugby where there is no problem with reversing the on field decision if the replays show it to be wrong and you generally get to hear the whole discussion explaining the decision on TV too.