Yes : but... - "It" wouldn't be a "computer" - you / someone would have to be able to understand it, which might be impossible (for a human) - you would have

Yes : but... - "It" wouldn't be a "computer" - you / someone would have to be able to understand it, which might be impossible (for a human) - you would have to be able to construct it, which might be very very technically hard but yes (ish)