Stradinger's Law
The principle that, in a professional environment, the person(s) who critically block your forward progress at any given moment are in a meeting when you go to look for them.
Peter: I was looking for Josep, Tony and Rafael for an architectural decision, and they're all in the architecture meeting.
Dominic: That's Stradinger's Law for you.
Dominic: That's Stradinger's Law for you.