http://www.freecodecamp.com/nirajkrz 's solution for Bonfire: Boo who

bonfire-boo-who.js

// Bonfire: Boo who
// Author: @nirajkrz
// Challenge: http://www.freecodecamp.com/challenges/bonfire-boo-who
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function boo(bool) {
  // What is the new fad diet for ghost developers? The Boolean.
  //Check if a value is classified as a boolean primitive. Return true or false.
  
    return typeof bool === 'boolean';
}

boo(null);