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```math
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p(E_n|E_m) = p(E_mE_n)/p(E_m)
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...
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```
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```math
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p(E_n|E_m) = p(E_m|E_n)p(E_n)/p(E_m)
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...
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```
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```math
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p(E_n|E_m) = p(E_m|E_n)p(E_n)/(\sum_{n=1)^N {p(E_m|E_n)p(E_n)})
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...
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```
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This is basically what Bayes’s formula is. It utilized under the hood of several models we will learn throughout the lecture. Let’s look at an example, for which we have [a visual illustration]( https://seeing-theory.brown.edu/bayesian-inference/index.html#section1) you can play with.
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