Bill Zebub
“It’s probably Matt Mercer’s fault.”
We have two rules that are in direct contradiction with one another. I am thinking of these two -
PHB 174 A DM calls for an ability check when a character or monster attempts an action (other than an attack) that has a chance of failure.
and
PHB185 In this case, it's you as a player determining how your character thinks, acts, and talks.
To my reading, D&D doesn't treat these statements as equal: it tips the scales to the DM. The section on PHB 185 - Roleplaying - is describing how players can go about doing that (how they can roleplay.) There's a fair argument that it is not concretely supplying a rule, even though it has been taken that way on these forums in the past. (I guess I have to step back from my earlier feeling of agreement with @Charlaquin on that score.)
[EDIT Or maybe there is another location where words similar to PHB185 exist and are more concretely cast as a rule?]
I'll say it again: it's not that the DM can't use the rule on 174 to say, "The Orc successfully intimidated you. Consider yourself intimidated." It's just that the player has 100% authority in deciding how to interpret and act on that, which makes the Orc's dice roll an environmental cue, not a mechanical state change.
No contradiction. (And, in my view, a pointless rolling of dice. If the DM wants the orc to be intimidating, make him/her intimidating.)