My confidence isn't coming from much said on here, where there is a lot of echoed group bravado. Or anything said by anyone with sources at the club. Or even the actions of the club (going about their business) as someone else mentioned.
It is coming from - partly the club's one and only statement, which is unambiguous and we have seen before with the last time we were found innocent. It is coming partly from a basic ability to read and digest what is available in the public domain. It would take some stretch of logic to believe all those alleged breaches have been committed by an organisation this big and this well oiled (ha, pun). And lastly partly from an ability to ignore those in the media that are either less intelligent, and/or have a clear agenda. Even if that agenda is just their own financial gain through sustained interest, i.e milking it, and not 'deliberately' malicious towards the club.
I do think the PL must think they have something, to have gone this far. I do think there may be some things we don't know that are maybe open to a difference in interpretation, and varying outcomes. But I think the club would not have gone about their business with any intention to deceive, and will be able to prove their side of it. Given all the books and activity have been signed off by various significant bodies, I struggle to think what the PL might have found that nobody else so far has. Other than either misinterpreted accounts (which should be able to be explained) or perhaps those selective spliced hacked emails, which have already been dismissed by CAS and wouldn't really trump official records.