The point I was trying to make is that your second example doesn't prove or disprove anything. You're simply comparing a primitive value. 1 will always equal 1, regardless of which variable it's stored in.

Your first example is enough to conclude that the locally scoped `event` is the same as the one on the window object, due to the pass-by-reference nature of JS objects. The fact that comparing the two returns true means they must be the same object.