A lair. No one will ever know everything about cars
An automotive technician.An automotive mechanic.
A gear head.
A motor mechanic.
mackanic
An automotive technician.
you call them a computer tech
mechanic car-bore-ator
You can call a person who knows what they want assertive, decisive, or self-assured.
call a couple of junk yards, and compare answers...you'll probably find a person that knows for certain... good luck d
vulcanologist.
A Skeptic person
A person who knows three languages is typically referred to as a trilingual.
Educated.
A person who hates reality may be described as an escapist or a disillusioned individual. They may try to avoid facing the truth or seek refuge in fantasy or imagination to cope with their feelings towards reality.
a lair
annoying