/// <summary>
 /// Calculates the relevancy to progress, ie find the exit door.
 /// </summary>
 /// <param name="blackBoard">The blackboard</param>
 /// <returns></returns>
 public override float CalculateRelevancy(BlackBoard blackBoard)
 {
     //return 1;
     // TODO: See below pls.
     if (blackBoard.CheckItemKnowledge(WorldStateSymbol.HasKey))
     {
         relevancy = persona.personalityModifer[Personality.PROGRESSION] + baseValue;
     }
     else
     {
         return(0f);
     }
     relevancy = Mathf.Clamp(relevancy, 0f, 1f);
     return(relevancy);
 }