Two prophets.
The accuracy of the first prophet's prophecy is 90%.
The accuracy of the second prophet's prophecy is 30%.
They both predicted the end of the world.
What's the probability of the end of the world?
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it's a binary outcome: if the second prophet predicts something, you can just put a NOT gate and just get 70% accuracy from the prophet.
Ok.
90% accuracy prophet predicted The world will end.
70% accuracy prophet predicted the world will NOT end.
.9*.3+.9*.7+.1*.3 or 93%?
I totally forget how this go
@BIGMATTHEW help
I have not actually taken a probability class but im pretty sure these are usually logic questions and the answer is not defined because the wizards contradict each other
Note my answer might be nonsense
Revisiting a real classic here
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@electrowizard explained this once before.
I think @Matticus made a 2d grid of the solution too.
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@big_ass perhaps we need to implement the fabled hypergeometric distribution to solve this problem 
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should probably queue up torch freeze mage on the Wild ladder....