Boundless Endurance?

[Nikosandros]

A short rest lasts 5 minutes. There aren't two separate conditions for ending encounter-long powers. It's always after 5 minutes.

 

[Bond James Bond]

A conditional duration of "until the end of the encounter" is defined on PHB p278: "The effect ends when you take a rest (short or extended) or after 5 minutes".

So if the stance lasts "until the end of the encounter", then immediately after the last round of combat, neither of those conditions have been fulfilled - he has not taken a rest (short or extended), nor have five minutes passed. The conditional duration lasts until one of those specified events occurs.

Thank you very much.

Another example where I didnt read the rules properly in 4e, but instead filled the holes with 3.x terminology

Just one more related question to be clear: does "take a rest" trigger if you just started taking a rest? I.e., if you get surprised after you´ve rested for 3 minutes, do you still are in a stance? (Sorry for the nitpicking )

 

[Lacyon]

A conditional duration of "until the end of the encounter" is defined on PHB p278: "The effect ends when you take a rest (short or extended) or after 5 minutes".

So if the stance lasts "until the end of the encounter", then immediately after the last round of combat, neither of those conditions have been fulfilled - he has not taken a rest (short or extended), nor have five minutes passed. The conditional duration lasts until one of those specified events occurs.

Or, in other words, the end of the encounter is not a condition that ends an effect that lasts until the end of the encounter.

-Hyp.

Actually (wish I had my books to give a page number) the listed steps for how to resolve an encounter ends with "one side dies/flees and the other takes an rest (short or extended)".

Officially, an encounter is never over without a rest of some kind.