I would question the use of the word philosophy in connection with JWs. Philosophy in the strict sense is a permanent enquiry into the truthful nature of things whereas JWs smugly think they have already arrived at the only conclusion possible.
With 43,000 other religions also claiming that their way is the shortcut to paradise, the only path God intended, philosophically speaking it makes you consider that solid foundations for religious "truth" must be missing.
Doctrines are a defining collection of the chosen beliefs of a sect, you pays your money and you takes your choice! If on the other hand you want to find clarity and get to the bottom of a matter, you must research and question everything, especially the authority and validity of source material.
So in answer to your question Wild Thing another question; what is the point in arguing about unprovable things?