Pedantic
Legend
It is not failed play for a player to ask "How slippery is the wall?" or "Can I get from A to B without taking an attack of opportunity?"
Nor to ask "If I take the high ground, will I get a bonus to hit?"
These sorts of things are core components of RPG play. They follow from the way that RPGs use real-world processes (often either geometric ones, like battle maps, or arithmetic ones, like reading dice results and adding or comparing numbers) to establish and change the fictional position of the players.
To be clear, the points I did not remove from your example I was contending were not negotiation, and the points that were negotiation, I contended were examples of failed play.