Expressions in statements must only be executed for their side-effects

Questions & Answers
1

Pretty simple script.

#pragma strict
var rag : GameObject;
var Health : GameObject;

function Start () {

}

function Update () {
	if(Health.GetComponent(CentralHealth).Health == 0) {
		rag.GetComponent(Ragdoll).Ragdoll == true;
	}

}
2

== is for comparison, = is for assignment. Line 11 in the code you posted.