ThirdWizard said:
By those two definitions, anything is fair so long as it doesn't deviate from RAW because it is proper under the rules and the DM isn't being dishonest with the group.
But, surely you don't believe that, because you admit that there can be unfair traps, even though you can follow the two definitions and still fail on the 3 point definition given above.
Ah, how funny. You truncated the definitions in order to remove where it is possible for a trap to be funny. Woo hoo for you!
"Free from
bias, dishonesty, or
injustice." Not exactly the same thing as free from dishonesty alone.
Here's the most important thing you're going to need to explain to me:
You keep saying that there it is possible to build an objectively fair trap. However, you admit that some would find this objectively fair trap to be unfair. How can you resolve these two seemingly contradictory statements?
That something has an objective quality A, and that others would claim that it instead has the objectively converse quality B, should come as no surprise to anyone. It is certainly not contradictory.
There are three possibilities:
(1) The person finding the objectively fair trap unfair is actually reacting to an internal bias, such as being upset that his monk died. Or a false sense of entitlement.
(2) The objectively fair trap is part of a larger complex which is objectively unfair.
(3) A combination of the above two.
Certainly you must have had experiences wherein one person claimed something was unfair when it was patently obvious that it was the person making the claim who was being unfair and/or unreasonable. This is not something that happens only on rare occasions; it would be the work of a lifetime to catalogue all of the frivilous lawsuits going on right now, let alone those which are over and those that are yet to be.
In addition, there are many ways the OP could be modified to make it unfair:
You’ve cleared out the dungeon and found the McGuffin you were seeking. Then you come to a room located in the back corner of the dungeon. In the room is only a large lever sticking up out of the floor. You search the room and find a secret door in one wall. You can’t find a way to open the door. The rogue searches the door and lever for traps, and finds none. The monk pulls the lever. He has to make a saving throw – he rolls a 19 on the die, adds in his mods, and fails the save. He turns into a pile of fine dust on the floor.
Not unfair. In fact, no evidence that the rogue even Took 20.
You’ve cleared out the dungeon and found the McGuffin you were seeking. Then you come to a room located in the back corner of the dungeon. In the room is only a large lever sticking up out of the floor. You search the room and find a secret door in one wall. You can’t find a way to open the door. The rogue searches the door and lever for traps, and finds none. The DM tells you that there is no trap. The monk pulls the lever. He has to make a saving throw – he rolls a 19 on the die, adds in his mods, and fails the save. He turns into a pile of fine dust on the floor.
Unfair because of dishonesty and bias. The DM told you that there was no trap, while knowing that there was a trap. Had the DM said, "You search and find no trap" this would be different. It would also be a lot closer to the uncertainty that the rogue would be feeling.
(Note: There is a difference between "dishonesty of belief" and actual dishonesty. If you are calling the troglodytes "lizard men" and the DM picks up on that and begins using the same terminology, he is not being dishonest...even though you may be unpleasantly surprised. The DM is not required to tell you that a room with an invisible occupant is not empty. However, and especially in matters of life and death, the DM has an obligation to be clear and reasonably precise. This is not a problem in the OP.)
You have talked things over with your group. Everyone hates traps, so you've decided as a group to never use traps. The DM is part of, and knows about, that decision. Later, you’ve cleared out the dungeon and found the McGuffin you were seeking. Then you come to a room located in the back corner of the dungeon. In the room is only a large lever sticking up out of the floor. You search the room and find a secret door in one wall. You can’t find a way to open the door. The monk pulls the lever. He has to make a saving throw – he rolls a 19 on the die, adds in his mods, and fails the save. He turns into a pile of fine dust on the floor.
Unfair. Violates social contract of group (DM does not have legitimate authority).
You’ve in a dungeon seeking the McGuffin. You have cleared out all of the dungeon up to a room located in the back corner of the dungeon. You search the room and find a secret door in one wall. The rogue searches for traps. However, the act of searching for traps triggers a trap. The rogue has to make a saving throw – he rolls a 19 on the die, adds in his mods, and fails the save. He turns into a pile of fine dust on the floor.
Unfair. The encounter is unjust. There is, simply put, no way to win.
You’ve cleared out the dungeon and found the McGuffin you were seeking. Then you come to a room located in the back corner of the dungeon. The rogue searches the entrance for traps, Taking 20, and finding nothing. In the room is only a large lever sticking up out of the floor. You search the room and find a secret door in one wall. You can’t find a way to open the door. You talk it over, and decide that the lever is probably trapped. As you go to leave the room, the DM tells you that a stone door slides from the ceiling, blocking this room off. The mage decides to use several spells to transform the stone, or bypass the wall, or teleport out of the room without using the lever. The DM tells you that the spells don't work. After a while, he tells you that each time the mage casts a spell he'll age 10 years. You decide to rest before dealing with the lever, to regain your divination, protection, and healing spells. Every ten minutes a monster teleports into the room to prevent your rest. Eventually, the monk agrees to pull the lever. He has to make a saving throw – he rolls a 19 on the die, adds in his mods, and fails the save. He turns into a pile of fine dust on the floor.
Unfair. The encounter is both biased and unjust.
Ridley's Cohort said:
Here is some information regarding a hypothetical encounter to look at:
Interesting. You are basically putting the sum total of the reasons that the OP's encounter should be considered unfair into one encounter?

Or is it just another straw man?
RC