Hypersmurf
Moderatarrrrh...
Jeff Wilder said:Again, you've got it backward: the penalty isn't incurred for having the option to attack, the option to attack is gained by accepting the penalty.
I emphatically disagree

The penalties apply when you fight this way. You don't fight this way when you accept the penalty.
And if 'fight this way' includes accepting the penalty, then the sentence effectively parses to 'You incur TWF penalties when you incur TWF penalties'.
The penalty applies when you fight this way, and fight this way is when you wield a second weapon in your off-hand, allowing you to make an extra attack.
You keep saying this, but it's only partially true. "Wielding a second weapon in the off-hand" is one condition, of two, of being able to make a second attack with that weapon; the other condition is "being willing to accept the combat modifier trade-off" (namely, the TWF penalties) exactly like other combat modifier trade-offs. If you're not willing to accept the penalties, you don't get the benefit. The penalty isn't imposed on you just because you happen to be holding a weapon in your other hand.
The penalty is imposed when you wield a second weapon in your off-hand, allowing you to make an extra attack. The penalty is a consequence, not a condition. "You suffer a –6 penalty with your regular attack or attacks with your primary hand and a –10 penalty to the attack with your off hand when you fight this way" tells us that the penalty is incurred when fighting this way, not vice versa.
Do TWF penalties automatically apply if the TWFer is holding a rod of lordly might in his off-hand? How about if he's holding a bar-stool in his off-hand?
Holding? No. Wielding? Yes.
Just like a shield. If you're using a shield as a shield - no penalties. If you're wielding a shield as a weapon - penalties. Whether or not you make an extra attack with it.
If you're holding a Rod of Lordly Might in your off-hand - no penalties. If you're wielding a Rod of Lordly Might as a second weapon in your off-hand - penalties.
Of course not ... unless the TWFer wants them to, so that he has the option of attacking with the rod or attack with the improvised weapon (bar stool).
Now, there I agree... but he makes that choice by deciding whether he is holding a barstool, or wielding a barstool. If he's wielding it, he takes penalties, but he threatens an area with the barstool. If he's holding it, he doesn't, and doesn't.
You wrote this, and you don't see the contradiction? You don't see the missing phrase that makes these all follow a similar model?
The missing phrase isn't there. You're making it up.
If you wield a second weapon (one condition, making it possible at all) and if you choose to take a penalty (a second condition, also making it possible at all), you can make an extra attack.
If you wield a second weapon, you've fulfilled the condition for being allowed to make an extra attack. This, in turn, yields penalties. If you don't want the penalties, don't wield the second weapon.
You can turn down the possible benefit of holding two weapons simply by not fulfilling the other condition required to gain the benefit: accepting penalties to your attacks.
That's not a condition, it's a consequence.
D&D does not force combat-modifier trade-offs on characters. They have to be accepted by the character.
[Maverick]Well, ma'am, it doesn't seem so in this case now, does it?[/Maverick]
When a character declares that he is charging, he accepts a -2 penalty to AC, but he is not forced to make an attack.
But he can't declare he's charging and not take the -2 penalty to AC. It's an unavoidable consequence of the action, whether or not he makes the attack. Likewise, a character cannot declare that he is wielding the barstool as a second weapon in his off-hand without taking the penalties to his attacks.
The first character can move up to his speed and attack with no penalty to AC, or he can charge twice his speed with a penalty. The second character can hold a barstool with no penalty to attacks, or he can wield it with a penalty.
-Hyp.