The point is, even when someone is actively looking to figure out how a magic trick is performed they can still be fooled. In an experiment like the one referenced here, physicists and chemists would tend to be out of their element if someone is actively trying to dupe them because science relies on experimenters honestly and accurately documenting their procedures.
It's no mystery where the discrepancy in Rossi's experiment likely originates: independant reseachers were not given complete control of the apparatus and procedures. The proper response to promising and surprising results, replicating and studying the experiment in detail by duplicating the apparatus providing the conditions producing the results, is not possible because that apparatus is, conveniently for anyone wishing to avoid it being revealed as a fraud, a trade secret.
The point was that they WERE fooled because they did not know how the trick was performed
There remains a distinct difference that you are trying to dispose of as if it were an inconvenient corpse: understanding that extraordinary claims require extraordinary extraordinary evidence, CERN revealed every detail of every aspect of their experiment, methodology, and results, inviting others to replicate their experiment, whereas Rossi, understanding that extraordinary claims generate extraordinary hype, is soliticiting money and withholding information.
Even if both CERN and Rossi were, in fact, fooled by erroneous results, which assumes honest intentions on the part of Rossi, this difference in methology remains, and confers falsifiability upon CERN's claims, whereas those of Rossi do not include sufficient attendant information to be replicated or falsified.
The poster to whom you are replying tried to point out to you that the only ones "fooled" by CERN's claims became so as a result of their own error, but you just didn't get it. CERN did not angrily insist that there is money to be made breaking the speed of light and prevent others from testing the claim, accusing the rest of the world of jealous dishonesty. Was CERN "fooled" as you say? If they were, they were very careful to avoid fooling others, inviting investigation to confirm their data and identify any weaknesses in their methods. There is a world of difference: one party is open to avoid and correct foolishness, whereas the other is secretive and preserves the ability to fool others. Whether any party is truly fooled in their heart of hearts can never be known and does not matter if they follow the scientific method, which Rossi does not.