Exploration of scoping, hoisting, and shadowing in javascript

scoping.js

// At all times you can use the debugger to break into the console in Chrome
debugger;
// Demonstration of Scoping
var global = "I'm alive!";

function() { // IIFE style function definition (note the parens at the end of the curly braces)
  // Point 1: Does global exist here?
  // If I define a variable here does it exist outside the IIFE?
  var inner_variable = "I'm alive inside!"

  var inner = function () { // Lambda style function definition
    // Point 2: Does global exist here?
    // If I define a variable here does it exist at Point 1?
    // If I define a variable here does it exist at Point 3? How about at Point 7?
    // What happens if I override the variable from Point 1 here (without)
    // the var keyword? How does that change the value

    function inner_inner() { // Normal function definition
      // Point 3:
    };
    inner_inner();

    // Point 4:

    if(true) {
      // Point 5:
    }

    // Point 6:
  };
  inner();

  // Point 7:

}();

// Point 8: What is alive at this point?
for(var b in window) { 
  if(window.hasOwnProperty(b)) console.log(b); 
}