Stupid or Crazy?

When someone believes something even though all evidence is contrary to that belief, does this mean they are stupid or crazy?

Instead of using religion as an example, I will use this one: some people still believe the earth is flat. Are they stupid people or crazy people?

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    Kairan Nierde

    Perhaps they are both or neither. They could just be stubborn. 

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      futilethewinds

      I didn't expect this to foster such a good, serious discussion. My serious, philosophical questions never do.

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        onyango makagutu

        Does this person posses the evidence? There could be evidence and they are not aware of it in which case they are just ignorant.

        If they have the evidence then calling them stupid would be an insult to the stupid, calling them crazy I'd feel insulted so I think they are just willfully ignorant or as GM has said delusional

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