Assertion: neural network's neuron | /r/CapableOf | calculate weighted sum
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text: It is in the hidden layers where all the processing actually happens through a system of connections characterized by weights and biases (commonly referred as W and b): the input is received, the neuron calculate a weighted sum adding also the bias and according to the result and a pre-set activation function (most common one is sigmoid, σ, even though it almost not used anymore and there are better ones like ReLu), it decides whether it should be ‘fired’ or activated.