In every boat sale I have experienced, the surveyor did something, assumed something, couldn't figure out something,...
In one case with a 27 ft Ericson, the surveyor didn't know the Univeral 5411 only spits water in normal operation and almost convinced the purchaser there was an engine problem. It was a simple explanation but could have caused the. Buyer to walk.
In another case, the surveyor couldn't figure out how to turn on the inverter concluding it was inoperative. He simply didn't realize he had to turn it on.
In yet another case, a surveyor reported the windlass broken rather than investigate to see the battery had been disconnected for winter storage.
I could go on but you get the point.