Interesting discussion!
How would anyone know? Isn't it usually the case that all enemies engaged in battle fall in battle?
As a general question to everyone:
"Do you find that at least one enemy escapes from most battles? Or are they all killed?"
When there are a lot of opponents, then yes, some usually escape rather than be killed.
Bluff doesn't allow a PC to remove an enemy from combat.
I realize that, but it can still be pretty potent in the hands of a rogue. It was just meant an another example of a skill with an explicit combat use.
An interesting omission. Do you see it?
Intimidate says "surrender", not "accept an offered truce". So when a DM uses intimidate, it's a truce in which the PCs won't get "meekly slaughtered". But when PCs use it, it's "surrendered"?
That's my fault... I was just trying to vary my vocabulary.
Let's look at it this way, then. If a dragon has nearly defeated the party, and says "throw down your weapons, and step into that cave or DIE!", would the party be likely to do it? I think so. Will they consider themselves obligated to meekly do whatever the dragon tells them? Maybe not. If the dragon follows them into the cave, which has no other exits, questions them a bit, then attacks again to kill, will the PCs act to defend themselves? Of course.
Monsters surrendering to PCs should have exactly the same attitude. If the party has enough time and strength to disarm and tie up all their opponents after a surrender, then of course they can kill them later. But will their opponents consider letting themselves be tied up a viable option? Depending on circumstances and the party's reputation, maybe they will and maybe they won't. Monsters who don't trust the party to keep their word, rather than letting themselves be made truly helpless, will probably choose to run or resume attacking.
I think you'll find the OP (of the orginal thread) was claiming "surrendered" did not mean "hold on to weapons, and fight again if the opportunity presented itself".
Which brings me back to my original point: a successful intimidate check can provoke a wide range of responses from the opponent, depending on circumstances. Furthermore, the opponents are very unlikely to surrender in such a way that renders them completely helpless.
Ben