Batman is standing next to Kraven the Spider, they're both in hindering terrain. Batman can't Outwit anything on Kraven, can he?

Kraven is on a Stealth click. My friend says that Outwit doesn't require a clear line of fire. I believe that it does. What's the ruling here?

You can not outwit someone is stealth because it does require a clear line of sight. I don't know how many times I have seen this question.

I know that this is the case, but my friend wanted to see proof. Sorry to be repetitive.

You can find proof on the actual PAC.

Check that when you have a question regarding powers, first.

If you still feel its not clear, then post - but honestly, it says it as clear as can be:

OUTWIT (OPTIONAL): Once during your turn (but not during another action), as a free action this character counters a power possessed by a single target opposing character. Treat the target as if it does not possess the countered power. That power remains countered until the beginning of your next turn. A character using this power must be within 10 squares of the target and have a clear line of fire to the target. Instead of a power, you may choose to counter an opposing flying character’s ability to soar; in this case, lower the soaring character to hovering mode. If this character loses Outwit or is KOd, the countered power returns immediately.

Read the pac found here this is one of the very basic rules of the game.

"A character using this power must be with in 10 squares of the target and have a clear line of fire to the target."

Stealth

"Any line of fire drawn to this character that crosses hindering terrian, including a sqaure of hindering terrian occupied by this character, is treated like as thought it crosses blocking terrian."

I thought it was crystal clear as well, but he was losing, and he was arguing that the line of fire did not apply if the figures are adjacent. Trying to argue from logic, instead of the rules I suppose. This was the only way to work it out. Sorry to bug you guys.

Sorry your friend needed more proof than the wording of the Power.

Hopefully he'll trust you and the PAC more often in the future.

Good luck.

Next time, instead of just you proving what you think is right, get him to do it as well. You can prove your argument and he can't prove his. You win.