Agree on Yorke.
I didn't say you have to be articulate to be smart, just that his judgement was terrible. Judgement is an indicator of intellect or lack thereof too. I can't consider someone who thinks Ronaldo is the best player of all time intelligent (especially when he's clearly not strong willed enough to remove his own bias as his mate when making the call). Or someone who's wrong as often as Ferdinand is.
Hargreaves, Fletcher and Keane don't seem bright to me. Yes they can put together sentences, but again they have terrible football opinions. Being able to express thoughts doesn't mean those opinions are logical. For instance, many people who posted on Stomfront before it was shut down were extremely knowledgeable and articulate, but were they intelligent? Look at the content of their opinions, they are articulate but if they were that bright they wouldn't be racists in the first place would they? They had extremely stupid opinions which to the gullible came across as intelligent because they had the gift of the gab. The oldest trick in the book politically. Likewise, Fletcher or Hargreaves might be able to express themselves fairly well but it doesn't change the fact that Fletcher's an awful coach and his opinions when he was a pundit were sketchy to say the least.
If Keane is bright how come he completely lacks emotional intelligence and was unable to make it as a manager? You'd think he'd have had some good methods. Although this might be a flawed point because Frank Lampard is apparently very intelligent yet he's proved to be a mediocre manager so far.