I did say at least five, not that those are the complete set. But also, I wouldn't call either of those two "GM negation". Neither relies on being the GM, and the second one isn't even negation, it's just a response.
Like, if a person (who happened to be the GM), pulled out a gun and said "I'll shoot you unless you take that action back!" - that wouldn't be GM negation. It'd be a crime though.
It's true, the way I defined it is pretty broad, maybe too broad.Originally Posted by NichG
I think that maybe more usefully, it would apply when this is a pattern of behavior - there are nominally computers in the game which can be hacked and (IC) have important data on them, but in practice the GM will give out the plot-important information with or without hacking, and won't give out any knot-cutting information regardless of hacking.
Also, IME, it's really hard to avoid doing this sometimes in an improv-heavy game. So I wouldn't say it's something where a single instance is a problem.