I can't see why Sky would try to create the rumour, but if you look at Kean's quotes he doesn't specify which defender he is trying to bring in.
I don't think even Stringer would be this adament with out proof.
And re: fourth official - just an example of many bits of info he gets wrong - he stated two days ago Derbyshire was coming to Leicester City. He gets loads of stick for getting things wrong which he has claimed are 'definite' or 'facts'.
Not to say he won't be correct on Bamba sale, but to me, it's too much of a coincidence that almost all of his info comes out just after a rumour or exclusive elsewhere (paper, SSN, etc). I think he claims he is 'in the know' when in fact he just has a lot of time on his hands and gathers together info/rumours from various locations - sometimes regurgitating, sometimes trying to fill in the gaps. Still useful place to visit if you dont want to trawl through loads of websites.