Then how is it that Harry and Bellatrix had the experience with Dementors that they did? Harry’s beliefs were well-justified, but he still had to KO Bellatrix before it worked.
And of course justified beliefs can disagree. As a purely trivial matter, true beliefs cannot disagree, so you are technically correct there, but well-justified beliefs can differ if the participants have different evidence. Sharing evidence will remove the disagreement(assuming that all evidence is in a mathematical form that cannot be disagreed upon, of course), but that isn’t always possible.
Then how is it that Harry and Bellatrix had the experience with Dementors that they did? Harry’s beliefs were well-justified, but he still had to KO Bellatrix before it worked.
And of course justified beliefs can disagree. As a purely trivial matter, true beliefs cannot disagree, so you are technically correct there, but well-justified beliefs can differ if the participants have different evidence. Sharing evidence will remove the disagreement(assuming that all evidence is in a mathematical form that cannot be disagreed upon, of course), but that isn’t always possible.