C# How to get/access List from another script

Hi,

I'm new with scripting and C#, and hope someone can help me with this issue.

I have a List in script PlayerKnowledge, but I want to access it and read through the List in script PlayerAttack, but I keep getting errors.

What I'm basically trying to do is to see if enemyName exists in the List, and if so do an action. I've tried a bit with getComponent etc, but no luck. This is my latest attempt with a getter method instead:

 //This is the first script
 
 public class PlayerAttack : MonoBehaviour {
     private PlayerKnowledge playerKnowledge;
     private List<string> knowledge;
     
     
     // Use this for initialization
     void Start () {
     
         var knowledge = new List<string>();
         
         PlayerKnowledge playerKnowledge = GetComponent<PlayerKnowledge>();
         knowledge = playerKnowledge.getKnowledge();
     }
 
 //This is the second script
 
 public class PlayerKnowledge : MonoBehaviour {
     public static List<string> knownNames; 
 
     
     // Use this for initialization
     void Start () {
         knownNames = new List<string>();
         
     }
     
     public string getKnowledge() {
             return knownNames;
     }

// Use this for initialization void Start () { var knowledge = new List(); PlayerKnowledge playerKnowledge = GetComponent(); knowledge = playerKnowledge.getKnowledge(); }

Which gives me this: error CS0029: Cannot implicitly convert type `string' to `System.Collections.Generic.List'

Anyone who sees a solution?