1. If an RHS look-up fails to ever find a variable, anywhere in the nested scopes, this results in a ReferenceError being thrown by the engine. I's important to note that the error is of the type ReferenceError.
If the engine is performing an LHS look-up and it arrives at the top floor (global scope) without finding it, if the program is not running in "strict mode", then the global scope will create a new variable of that name in the global scope, and hand it back to Engine.
2. Cheating Lexical
1) eval
2) with: Even though a with block treats an object like a lexical scope, a normal var declaration inside that with block will not be scoped to that with block, but instead the containing function scope.
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