Well ... obviously any Gettier-style example will not have enough evidence because someone came to the wrong conclusion. But there is a subtle flaw in your obje

Well ... obviously any Gettier-style example will not have enough evidence because someone came to the wrong conclusion. But there is a subtle flaw in your objections to Wikipedia's examples - to have a proper argument you would need to provide a counterexample where there is enough evidence to be certain of a conclusion. And the problem is that isn't possible - no amount of evidence is enough to come to a certain conclusion. The issue that Gettier & friends is pointing to is that there are no examples where there is enough evidence. So under the formal definition it isn't possible to have a JTB. If you've seen enough evidence to believe something ... maybe you'd misinterpreted the evidence but still came to the correct conclusion. That scenario can play out at any evidence threshold. All else failing, maybe you're having an episode of insanity and all the information your senses are reporting are wild hallucinations but some of the things you imagine happening are, nonetheless, happening.