Storm Raven said:
No he didn't. He gave you two exceptions to the rule that you have to threaten to make a melee attack. He didn't say anything about whether you could be flanking in those situations. In at least one (the standard unarmed attack), he explicitly said you can make a melee attack and not flank, because you don't threaten.
Thank-you Storm, I could not have said it better.
The rules do state that you are not threatening when making a melee unarmed attack, page 137 under threatened sqaures, exception one.
Exception 2, page 121 under the whip entry also says you don't threaten squares into which you can make an attack.
Most rules have exceptions, thats just the life of D&D.
Atom, in order to make an attack into a square, you threaten that square (with the exceptions noted above).
Al is using a whip, Bob is using a sword (type up to you), and we have a creature who is not immune to flanking attacks.
A...CB
Since Al Does not threaten the square the creature is in, Bob does not get a flanking bonus to attack. Al does not meet the requirement of threatening the opponent.
Al, however does get a flanking bonus to attack with his whip since Bob meets all the requirements to give Al the flank.
But as mentioned b4, if this seems unreasonable to you, then don't allow it.
Similarly, Al is unarmed and Bob is using a sword.
ACB
Same situation, Bob does not get the flank bonus, but Al does. The rules seem clear that inorder to get a flank bonus, your ally must meet the requirements, not you.
Each exception to the rule of threaten does not invalidate the flanking rule, all it does is make clear in what types of situations you can flank. Given that the wording is clear and unabigious, a literal interpretation of the rule is all that we can go on. It does not leave much room for obscure interpretation.
These two exceptions to the rule (and there may be more), must be allowed considering the wording of the flanking rule.
Similarly a creatures that threatens a square does not mean that they can flank or likewise give a flank to someone else as in the case of smaller than small creatures. This is yet another exception to the rule.
If a creature has 0 reach, it must enter an enemy’s
square to attack that enemy, correct? If the creature enters
the enemy’s square, does it now threaten the enemy? Is it
possible for the creature to flank the enemy? If so, where
would an ally need to be positioned in order to flank the
enemy?
If you’re armed and you’re in a position to make a melee
attack against a foe, you threaten that foe (see Threatened
Squares under the Attacks of Opportunity section in Chapter 8
of the Player’s Handbook). To be armed you must wield a
weapon or have natural weaponry. If your reach is 0, you can
threaten foes in the same square with you only.
A creature with a reach of 0 cannot flank an opponent (see
Flanking in Chapter 8 of the Player’s Handbook). Such a
creature can neither gain a flanking bonus from an ally nor
grant a flanking bonus to an ally, not even when two or more of
them enter the same foe’s square and attack.
From D&D Faq Page 26