title: Why the VC dimension of 2D perceptron is 3?
body: <p>If three points in one line as below, how can the 2D perceptron classify this 3 points?</p>
  
  <p><a href="https://i.stack.imgur.com/vHudZ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/vHudZ.png" alt="enter image description here"></a></p>