In United States of America it would be "Politician". They are predominantly Lawyers in the Government of laws that is based upon the constitution of them!
Omniscient means all-knowing. 'Omni' means 'all'.
non-aquaintance I think
Having total knowledge; knowing everything.
Pandora
He is a very tactful person, knowing how to deal with any situation.
jack of all trades
It all depends on the person. And since each person is unique, itd be hard to guess even knowing the person
A person who understands everything is often referred to as omniscient or all-knowing.
Saber, if you are talking about factual information. If you are speaking of knowing a person, the verb is "concocer".
The word "omniscient" means "all-knowing" but except when used to describe a literary point of view, it often has a connotation of divine or supernatural ability.
He looked at them in bafflement, not knowing at all what to say or do.
Third person omniscient