How Machines Learn
Neural Networks, Explained Gently
7 min+60 XPStep 1/9
Inspired by brains, made of math
Your brain is 86 billion neurons, each one a tiny decision-maker: get signals in, add them up, fire or don't.
An artificial neuron copies that in miniature: numbers come in, each gets multiplied by a weight (how much it matters), they sum up, and the neuron outputs a number. That's it — one neuron is a weighted vote.
analogy
One neuron is like a group-chat decision: every friend gives an opinion, but you weight them differently — the foodie counts double on restaurants, the flaky one counts for nothing. Your decision is the weighted sum of the group.