Lexical assignment
	lvalue = rvalue
		Walk up the linked list of parent scopes. If lvalue doesn't exist in this scope or any parent scope, assign it in *this* scope. Otherwise, assign it in the closest parent scope.

Dynamic assignment
	lvalue := rvalue
		Do a straight assignment in this scope.

Of course I'm sure elliott will instead want to use lvalue ⎌ rvalue and lvalue ⏏ rvalue