The guardian, briefly explained
A shadow going out is better than nothing at all.
The large cloud AIs are getting better at a rapid pace, whatever the continent: convenient, fast and strong at complex tasks. Still, you do not want to hand them your private and business data. But you do not want to give up the convenience of having them assess your business papers either.
That is why the guardian sends out only a shadow: a shadow copy of your document in which names and confidential details are replaced by placeholders. The cloud AI works with this copy, the answer comes back to you, and only at your site are the placeholders replaced by the real details again.
Anyone who works only with a local AI sits in a capsule. With the guardian you use the strength of the big ones, until local AI systems are equivalent.
You book guardian and shadow copy separately. Without hybrid, nothing goes to a cloud AI.