Talents vs Psionics

[Sunrunners_Fire]

Originally Posted by Hanzorigami

I assume we are talking about the Pionic Powers supplement,

Correct. I had read that you were using that book, and so tailored my answer accordingly.

so I guess when you say "You can use the Power without the skill" you are talking about Psionic Traits (abilities that have no associated skills like Psi Static, or Possession), but what about Psionic powers? They all have a skill associated or a default (which in order to apply you need to have the skill anyway! I guess the default objective is just to save some points by not getting the ability).

You pay for the Power with character points. You can use said Power without investing any points (at all) (for any Power that doesn't have a limitation saying Requires 'Skill Name' Roll; which absolutely none of the Powers in GURPS Psionic Powers has) in the associated Skill. You can invest character points in learning the associated Skill for the Power, in order to roll something other than Attribute; but it is not required to do so in order to use the Power.

So if I understand correctly, in order to use any Psionic Power you need to get the ability (a requirement)

Correct.

and at least one skill that allows you to use that ability.

Incorrect. The Skill is not required. It is optional. It is suggested. But in no way required. Without the Skill trained, you roll the appropriate Attribute (usually IQ or Will) instead.

If this skill can be used in another ability as a default, you do not need to get that ability too,

Kinda. If you want to use that other Power, you must purchase that Power to use it even if it shares a Skill with another Power. Skills are for techniques, Power is for ability to do something.

but in either case in order to effectively use the ability, you need a success roll against the skill (or default with its corresponding penalty for not getting the ability),

In order to use a Power, you need to successfully roll against the appropriate Attribute (if the Skill is not trained) or the appropriate Skill (if the Skill is trained).

otherwise you can not use the skill.

Correct. You need the Power to be able to use the Skill, as the Skill does nothing by itself.

That means that there is no way to use a psionic power by getting only the ability since in order to use it a success roll is needed,

Incorrect, as per above.

however Psionic Traits can be used just like a regular Advantage since they have no skills associated.

Any Power can be used just like a regular Advantage, with or without an associated Skill. If you don't have the Skill, you merely check against the appropriate Attribute instead.

Some Powers (those without an associated Skill) do not require an Attribute check nor a Skill check in order to function. They just work.

Puff!!! Can someone tell me if all the stuff I have just mentioned above is correct? :)

The way to think about it is: Power (required to benefit from) + Optional Skill (in order to use the Psionic Power Techniques as listed and described under the Power description). If you don't have any points in the associated Skill, you use the appropriate Attribute instead.