LOL, I'm looking at the Mob Rules Album right now, It says, Lead Vocals, Ian Gillan.. Believe it, if Dio did the album, his name would be on it! After all, its about copywrites and royalties on album sales $$$$$..
When I talk about making an Album, I mean virgin material.. Compilations, reunion tours, live albums, or when they are performing old material, doesn't count to me, as "Making an album"...
I have every Sabbath album, from the first album to Mob Rules, 1st Stampings every one.. Still keep em in a peach crate too, LOL!
RC

This is not open to debate.
Just man up and admit you were wrong and lied about the whole "I'm looking at the Mob Rules Album right now, It says, Lead Vocals, Ian Gillan" bit.
Takes all of 2 min to take a picture, upload it, and post it here.
Hell, I bet you never even
looked at the Mob Rules album you "say" you have.
Either you are wrong or the whole world is.
You would have to be a tone deaf moron to ever confuse Dio's voice with Gillians.
All ya' gota do is listen to any song off Mob Rules to know who is doing the singing.