>>You better watch out he doesn't allocate your boss's job to himself in 1.5 years!
>>
>
>Words to work by:
>
>Don't be irreplaceable. If you can't be replaced, you can't be promoted.
>
>Here at where I work we used to have people the wouldn't share their knowledge thinking they had job security then. I personally don't believe anyone isn't replaceable. It might hurt for a while but someone still step up or you might learn that you didn't need that information in the first place.

So Evan could actually, shall we say "not help prevent this person from falling from a 10th storey window" without too much loss to his company?