Comments of chapter undefined of The ability collection

his line of sight is understand what thing he want to erase. so his weakness is to attack him with something that non-fiction user not understand so that the non-fiction user can't erase it.then what about him healing himself ? his non-fiction have 1 minor drawback that is it effect everyone even enemy so non-fiction healing is always spesific depending on what cause harm to self example if he wounded by a knife then he must erase concept wound inflicted by knife (if he erase concept wound then he and all people basically can't be wounded just bcs there is no concept wound)