Untrained Skill Checks

Generally, if a character attempts to use a skill he or she doesn't have any ranks in, the character makes a skill check as described. The character's skill modifier don't include skill ranks because the character doesn't have any. The character does get other modifiers, though, such as the ability modifier for the skill's key ability.
Some skills can be used only if the character is trained in the skill.
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Using Skills
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