Okay, might have worded that better. It says “The radiation was not predicted by previous models” and “is predicted to be extremely faint”, not “it is predicted to exist” - and also “[it] is many orders of magnitude below […]” which sounds like a statement of fact. I realise this may be nitpicky but I don’t know if people who don’t know anything about the subject would interpret that as “we don’t really know if it even exists yet”.