 to the <strong>identity</strong> of the parent value. That means the
<a href="api/ng/type/$rootScope.Scope#$watch"><code>$watch</code></a> on the parent value only fires if the reference
to the value has changed. In most cases, this should not be of concern, but can be important
to know if you one-way bind to an object, and then replace that object in the isolated scope.
If you now change a property of the object in your parent scope, the change will not be
propagated to the isolated scope, because the ide