@Override
	public boolean invoke(MOB mob, List<String> commands, Physical givenTarget, boolean auto, int asLevel)
	{
		MOB target=mob;
		if(target==null)
			return false;
		if((auto)&&(givenTarget!=null)&&(givenTarget instanceof MOB))
			target=(MOB)givenTarget;
		if(target.fetchEffect(ID())!=null)
		{
			mob.tell(L("You already have comprehension."));
			return false;
		}

		if(!super.invoke(mob,commands,givenTarget,auto,asLevel))
			return false;

		final boolean success=proficiencyCheck(mob,0,auto);

		if(success)
		{
			invoker=mob;
			final CMMsg msg=CMClass.getMsg(mob,target,this,CMMsg.MSG_DELICATE_SMALL_HANDS_ACT,auto?L("<T-NAME> feel(s) more comprehending."):L("^S<S-NAME> listen(s) with intense comprehension.^?"));
			if(mob.location().okMessage(mob,msg))
			{
				mob.location().send(mob,msg);
				beneficialAffect(mob,target,asLevel,0);
			}
		}
		else
			return beneficialWordsFizzle(mob,target,L("<S-NAME> attempt(s) to listen with comprehension, but fail(s) miserably."));

		// return whether it worked
		return success;
	}