Pralysis immunity does not imply stun immunity.

Paralyzed is not an increased form of stunned. Their sources and actual effects are completely different:

A paralyzed creature…

• is frozen in place.
• cannot move at all, its Str and Dex are, effectively, 0.
• is helpless
• has generally been the victim of a paralytic poison or spell.

A stunned creature…

• is unable to take actions, but can still take nonactions (like a 5-foot step).
• loses its Dex bonus to AC (if any) plus suffers a −2 penalty on Armor Class (and a foe's combat maneuvers that use its CMB gain a +4 bonus).
• drops any held equipment.
• has usually been the victim of powerful or tactical blows, such as to the head.

Paralyzed means you are completely frozen in place, whereas stunned means it's like getting hit by a boxer's right cross to the chin—you're so close to being knocked out you can't properly defend yourself that you're basically just stumbling around.

Paralysis immunity does not imply stun immunity.

Being paralyzed is not an increased form of being stunned. Their sources and actual effects are completely different:

A paralyzed creature…

• is frozen in place.
• cannot move at all, its Str and Dex are, effectively, 0.
• is helpless
• has generally been the victim of a paralytic poison or spell.

A stunned creature…

• is unable to take actions, but can still take nonactions (like a 5-foot step).
• loses its Dex bonus to AC (if any) plus suffers a −2 penalty on Armor Class (and a foe's combat maneuvers that use its CMB gain a +4 bonus).
• drops any held equipment.
• has usually been the victim of powerful or tactical blows, such as to the head.

Paralyzed means you are completely frozen in place, whereas stunned means it's like getting hit by a boxer's right cross to the chin — you're so close to being knocked out, you can't properly defend yourself — that you're basically just stumbling around.

Creatures immune to paralysis (like a duergar) can be stunned

Paralyzed is not an increased form of stunned. Their sources and actual effects are completely different:

A paralyzed creature…

• is frozen in place.
• cannot move at all, its Str and Dex are, effectively, 0.
• is helpless
• has generally been the victim of a paralytic poison or spell.

A stunned creature…

• is unable to take actions, but can still take nonactions (like a 5-foot step).
• loses its Dex bonus to AC (if any) plus suffers a −2 penalty on Armor Class (and a foe's combat maneuvers that use its CMB gain a +4 bonus).
• drops any held equipment.
• has usually been the victim of powerful or tactical blows, such as to the head.

Paralyzed means you are completely frozen in place, whereas stunned means it's like getting hit by a boxer's right cross to the chin—you're so close to being knocked out you can't properly defend yourself that you're basically just stumbling around.

Pralysis immunity does not imply stun immunity.

Paralyzed is not an increased form of stunned. Their sources and actual effects are completely different:

A paralyzed creature…

• is frozen in place.
• cannot move at all, its Str and Dex are, effectively, 0.
• is helpless
• has generally been the victim of a paralytic poison or spell.

A stunned creature…

• is unable to take actions, but can still take nonactions (like a 5-foot step).
• loses its Dex bonus to AC (if any) plus suffers a −2 penalty on Armor Class (and a foe's combat maneuvers that use its CMB gain a +4 bonus).
• drops any held equipment.
• has usually been the victim of powerful or tactical blows, such as to the head.

Paralyzed means you are completely frozen in place, whereas stunned means it's like getting hit by a boxer's right cross to the chin—you're so close to being knocked out you can't properly defend yourself that you're basically just stumbling around.

Yes, a Duergar (and other paralysis immune creatures) can be stunned

Paralyzed is not an increased form of Stunned. Their sources and actual effect are completely different:

[Paralyzed][1]:

• Frozen in place
• Cannot move at all, Str and Dex are effectively 0
• Helpless
• Generally caused by a paralytic poison or spell

[Stunned][2]:

• Unable to take actions, but can still take non actions (5 foot step)
• Loses Dex to AC (can't dodge), plus -2 AC (and CMB's targetting get +4)
• Drops equipment
• Usually caused by powerful or tactical blows, such as to the head

Paralyzed means you are completely frozen in place, whereas Stunned is more akin to getting hit by a boxer's right cross to your chin, and you're so close to being knocked out you can't properly defend yourself that you're mostly stumbling around. [1]: http://www.d20pfsrd.com/gamemastering/conditions#TOC-Paralyzed [2]: http://www.d20pfsrd.com/gamemastering/conditions#TOC-Stunned

Creatures immune to paralysis (like a duergar) can be stunned

Paralyzed is not an increased form of stunned. Their sources and actual effects are completely different:

A paralyzed creature…

• is frozen in place.
• cannot move at all, its Str and Dex are, effectively, 0.
• is helpless
• has generally been the victim of a paralytic poison or spell.

A stunned creature…

• is unable to take actions, but can still take nonactions (like a 5-foot step).
• loses its Dex bonus to AC (if any) plus suffers a −2 penalty on Armor Class (and a foe's combat maneuvers that use its CMB gain a +4 bonus).
• drops any held equipment.
• has usually been the victim of powerful or tactical blows, such as to the head.

Paralyzed means you are completely frozen in place, whereas stunned means it's like getting hit by a boxer's right cross to the chin—you're so close to being knocked out you can't properly defend yourself that you're basically just stumbling around.