Maxperson
Morkus from Orkus
Not 100% certain =/= vague. There was nothing vague about ANY of those quotes of mine, even if when you squint sideways you can finagle a bit of room for it not to be 100%.My position and I think the position of others is not that 5e has a strong view against GM authority/rule zero (whatever that is, we still don't have a working definition) , but instead that it is deliberately vague about such things. This is the compromise edition, the 'please like us and do whatever you would normally do' edition.
There is no inherent lie with fudging.Fudging is still a lie. 'Oh I rolled a 20, wink emoji' or 'Oh I didn't roll a 20, wink emoji'.
Again, please show me the text of this rule zero.
DM rolls an 18: "I rolled a 5." = lie.
DM rolls a 20: "The monster missed." = truth. The monster did miss since the DM is within his rights to alter outcomes. The roll doesn't have to determine the result. As the quote I provided earlier said, rolling is like a rule and the DM is not subject to the rules, they are subject to him.
I do it all the time if a player rolls and in mid roll I decide that he really didn't need to roll, even if that roll comes up a 1. I just tell the player that I don't think his PC could fail, so he succeeds.