title: Equal Parameters without Comparison Operators
body: <p>I'd like to create a predicate that evaluates if the two parameters entered are the same. Here's what I wrote (pretty basic)</p>
  
  <pre><code>same(A, B) :- A == B.
  
  same(21, 21) % true
  same(var, 'var') % true
  same(var, 'Var') % false
  </code></pre>
  
  <p>I would like to do it <strong>without using comparison operators</strong> but I have no idea how. Any tips for me?</p>