Before the network
by Froga
What Machine learning 2 builds on: the logic gates again, what makes a neuron fire, what a feature is, and why a perfect score on practice questions can mislead. About ten minutes.
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Study material
Three gates from the CPU lab. AND is 1 only when both inputs are 1. OR is 1 when at least one input is 1. XOR ("exclusive or") is 1 when exactly one input is 1: either, but not both.
XOR is 1 when exactly one of its two inputs is 1. What is 1 XOR 1?
multiple choice
A1, because both inputs are on
B0, because it wants exactly one input on
C2, because 1 + 1 is 2
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