With the new DC... I don't know how I will be able to use the feat unless if i use dubious knowledge or we are against a lot of little easy creatures.
Can someone shows me how it can be used?
The problem with this feat is the last sentence that says you must use your assurance on the skill check (or rather not roll). I'm playing chapter five and ruled that recall knwoledge action to identify monsters is a medium dc, 26 for lv 12 characters. A player on my group has this feat so I house ruled that if the player want he can roll or use assurance.