Feat Prerequisites temporarily not met?

[Daengren]

I have a rogue with improved two-weapon fighting that requires a DEX score of 17. My rogue has a 20. If my rogue becomes entangled, it gets a –4 penalty to Dexterity. This drops his core down to a 16. Does he now lose improved two-weapon fighting until the entangled condition is removed?

[Jeraa]

Daengren wrote:

I have a rogue with improved two-weapon fighting that requires a DEX score of 17. My rogue has a 20. If my rogue becomes entangled, it gets a –4 penalty to Dexterity. This drops his core down to a 16. Does he now lose improved two-weapon fighting until the entangled condition is removed?

Penalties and ability damage do not change your score in any way. They just give penalties to certain things.

Quote:

Diseases, poisons, spells, and other abilities can all deal damage directly to your ability scores. This damage does not actually reduce an ability, but it does apply a penalty to the skills and statistics that are based on that ability.

Ability drain, on the other hand, does actually reduce the score. In that case, you would lose access to the feat until the drain is removed.

[CWheezy]

If you took ability drain, from a poison or spell, you would temporarily lose access to the feat, since ability drain specifically changes your ability score