Scion said:
didnt hyp say something about getting a reflex save even if unconscious, just that your dex was 0 or something like that, could be wrong, it was awhile ago.
Hyp says the opposite, based on the quote from Evasion Silveras provided.
However, a Medium creature standing in a 10 foot room that gets hit with a fireball does not lack room to move... even though the fireball's area encompasses the entire room.
We know that a creature making a Reflex save does not leave his own square except under certain specific circumstances (save vs a falling Wall of Iron, for instance, allows creatures to "flee the falling wall"). Therefore a creature standing in the middle of a boundless plain, and a creature standing in a ten foot room, and a creature standing in a five foot room, all have the same "room to move" (assuming a Medium creature) - since he never leaves his square, he's only using five feet of space no matter how large the area around him is.
However, a Medium creature in a 2.5' tunnel does
not have "room to move" (the example given in the Evasion description, from memory), and cannot use Evasion...
as with a Reflex save for any creature.
The person in the ten foot room being fireballed can make a Reflex save. The person squeezed into the 2.5' tunnel cannot.
For the unconscious, held, paralyzed, or otherwise helpless person, who - with a Dex of zero -
cannot move at all, no amount of room is "room to move". A 2.5' tunnel is not enough room to allow the helpless character to move. A 10' room is not enough room to allow the helpless character to move. A boundless plain is not enough room to allow the helpless character to move. And so he cannot use Evasion...
as with a Reflex save for any creature.
-Hyp.