/// <summary> evaluate the node's value against the slot's value. The method
/// uses Evaluate class to perform the evaluation
/// </summary>
/// <param name="">factInstance
/// </param>
/// <param name="">engine
/// </param>
/// <returns>
///
/// </returns>
public virtual bool evaluate(IFact factInstance)
{
return(Evaluate.evaluate(operator_Renamed, factInstance.getSlotValue(slot.Id), slot.Value));
}