Check if a value is classified as a boolean primitive. Return true or false. Boolean primitives are true and false.

boo-who.js

function booWho(bool) {
  // What is the new fad diet for ghost developers? The Boolean.
  //check if the value 'bool' is strictly true or false, this means the value is a Boolean Primitive and should return true.
  //Everything else should return false.
  if(bool === true || bool === false){
    return true;
  }
  else {
    return false;
  }
}

booWho(null);

dude loved your gist! 👍
here is my version based on yours

function booWho(bool) {
  return (bool === true || bool === false)
}

booWho(null);