Aren't "look random to somebody else" and "be random" two totally different things? How can they tell that 1234561234 is not the result of a 10 x random dice r

Aren't "look random to somebody else" and "be random" two totally different things? How can they tell that 1234561234 is not the result of a 10 x random dice roll? What's the probability of a real RNG being considered better/worse than a 25 year old? Related Dilbert: http://dilbert.com/strip/2001-10-25 http://dilbert.com/strip/2001-10-25