Visits from a couple JW Elders? Do you mean Mormons? 2 JW "Elders" very very rarely preach together, they feel their beneficent presence is best shared with "weak" ones.
Anyway try tossing out the scholarly position that the Prologue 1:1-18 was a separate unit, perhaps a Gnostic hymn, that was collected and attatched to the Gospel. Watch them make blanket dismissals of the value of non-JW scholaship. It will be a glimpse into the mind of a JW.