I'm looking at running a campaign with this new system (coming from a heavy Pathfinder and moderate 5th Ed. D&D background) and I have a question based on my reading of the free CRB - does each of the 'skills' have an applicable ability to which your modifier is added? And of not what is the purpose of some of the mental stats like (for example) wisdom beyond saves? It seems that some do have a skill (like doors and strength) but others are unlisted... Any help would be appreciated.