This came up in a scenario game last night. The Gozanti Cruiser used the Jam action against a ship with Electronic Baffle. The Jam action reads:

To perform a jam action, "choose one enemy ship at Range 1-2 and assign it stress tokens until it has a total of two stress tokens."

And here is Electronic Baffle

There are a couple of ways I can envision this playing out, but the rules have been a little unclear to me, and I'm hoping you fellow X-wing aficionados can help me out.

1) The ship receives the first stress token, and up on receiving it, executes Electronic Baffle. The number of stress tokens is less than two, so another one is assigned, and the player may again choose to suffer a damage to discard that token, and so on until the ship is destroyed. The only thing stopping this (besides common sense) is the possibility of abilities triggering only once per opportunity, i.e. Electronic Baffle can be used only once per Jam action, but the cards don't indicate this kind of limitation.

2) The player with Electronic Baffle wisely let's the first stress token, and then after the second token has been assigned, Jam's requirements have been fulfilled, and the second stress can now be safely discarded in exchange for a damage. I don't think there is any real reason that the first scenario above would apply in the same way to the second token because the trigger "until there are a total of two stress tokens" has been satisfied.

3) For some odd reason, probably just being antsy to keep playing, we ruled that he received the tokens together in one batch, and then the Jam action was over, and he could elect to take one, two or no damage and discard the appropriate number of stress tokens. There is nothing in the rules that suggest this is legal, so I think we played it entirely wrong, but it didn't end up making much of a difference because he won the scenario handily.

What do you think about this interaction? Please link to any topic that has previously discussed this. I found this topic on Rage, but I decided to post anyway

Actually, I think I would lean toward the ruling that you guys used, partly on an interpretation of what the cards are intended to do and partly on phrasing of Jam vs some other mechanics. Allow me to elaborate entirely more than anyone wants me to probably haha.

So first off, I think it's clear that the intent of jam is for a jammed ship to end with two stress. So if they have 0 they get 2 and if they have 1 they get 1. Technically you could jam someone that already has 2 but nothing would happen because they already have 2 so you assign 0 stress to get them to 2 and the action is wasted unless that could be done to trigger some other effect. Now I know some people don't like us to interpret "intent" because of slippery slope blah blah but within reason I think it's perfectly acceptable. Also, let's take another scenario: a ship that has 3 or more stress before being jammed. The action says "Assign stress until they have a total of 2" It doesn't say 2 or more, or at least 2, it specifically says 2. So by a STRICT interpretation of the wording jamming a ship that already has three of more stress should result in it having infinite stress. You'd add a stress (total of 4 now), is it 2? Nope. Add a stress (5). Not 2. Add a stress. repeat forever. Now OBVIOUSLY that's ridiculous and it doesn't work that way but reaching that conclusion requires some interpretation of intent. Additionally, I would say the intent of Electronic Baffle is to allow you to take damage in lieu of stress or ions if you wish. The "when assigned" phrase is to make it clear that you have to do it when they stress comes in and not later in the round or even on a different round.

Also as far as when jam applies the stress, I think there is actually good reason to think that the 2 stress would come simultaneously. So it says "assign stress until they have 2" so it might seem sequential but I think it wold need to happen all at once before something else (like EB's discard ability) could interrupt. There are a couple cards that have multiple steps. Push the Limit, Experimental Interface, and Bossk crew I know for sure. There may be others but those I know off the top of my head. All these have one thing in common: the word "then". All of them say "Do X. THEN Do Y." So per the FAQ you can do PTL and EI in the same turn because they have two separate steps and can be interrupted. Both say basically "Do an action THEN receive a stress" but you can go PTL action, interrupt with EI action, take EI stress, (EI is now done so return to PTL sequence) take PTL stress.

Jam says "assign until they have 2" it does not say "Assign a stress. THEN if they only have one, assign another" so based on the "THEN" examples I would say jam is in fact supposed to happen all at once. Based on that and Electronic Baffle being designed to let you take damage instead of stress as an option I would rule that a jammed ship with EB could take 0, 1, or 2 damage and the appropriate amount of stress in response to a jam. If the ship already had one stress it could take either a second stress or a single damage but could not discard the old stress as the window for that one had already passed.

So I actually rule in favor of the interpretation you used based on what I think are sound arguments. However, I will concede it could be reasonable to go with Option 2 from your post but absent an official ruling I'm going with mine.

Wasn't there a ruling somewhere about Captain Yorr and the Jam action that said the stress is applied one at a time, so if he were to pass the stress off to an ally it would still be pointless?

On the spot, I would have ruled the same way you did. I have no idea what the "real" ruling would be--at least, not at 10pm and stuffed full of migraine drugs.

Jam has an until clause. This means stress is assigned one at a time and then you check if it has 2. If not you repeat.

Electronic Baffle happens when the token is assigned. Which is before you check the limit. So if you use EB it is simply free damage as Jam will keep stacking stress until there are 2 stress tokens.

Forgottenlore is right that there was some ruling on this in the past. Not only for Yorr but for stress mitigating abilities.

Electronic Baffle wouldn't block the Jam action unless you wanted to suicide the ship to do it. Which might be funny if it has dead man's switch.