Skill Actions
Source Player Core pg. 183
The actions you can perform with a given skill are sorted into those you can use untrained and those that require you to be trained in the skill, as shown on the Skills, Key Attributes, and Actions table. The untrained and trained actions of each skill appear in separate sections within the skill's description.
Anyone can use a skill's untrained actions, but you can use trained actions only if you have a proficiency rank of trained or better in that skill. A circumstance, condition, or effect might bar you from a skill action regardless of your proficiency rank, and sometimes using a skill in a specific situation might require you to have a higher proficiency rank than what is listed on the table. For instance, even though a soldier untrained in Occultism could identify an extraplanar or eldritch being with a lucky roll using Occultism to Recall Knowledge, the GM might decide that Recalling Knowledge to determine the spells used to summon and control such a creature is beyond the scope of the soldier's anecdotal knowledge. The GM decides whether a task requires a particular proficiency rank.
Anyone can use a skill's untrained actions, but you can use trained actions only if you have a proficiency rank of trained or better in that skill. A circumstance, condition, or effect might bar you from a skill action regardless of your proficiency rank, and sometimes using a skill in a specific situation might require you to have a higher proficiency rank than what is listed on the table. For instance, even though a soldier untrained in Occultism could identify an extraplanar or eldritch being with a lucky roll using Occultism to Recall Knowledge, the GM might decide that Recalling Knowledge to determine the spells used to summon and control such a creature is beyond the scope of the soldier's anecdotal knowledge. The GM decides whether a task requires a particular proficiency rank.