hey, next time they want to talk with you make sure you have your "reasoning of the scriptures" book with you, turn to page 234 and under the definition of the LAST DAYS read the last sentence to them under the definition. then turn to page 242 in the same book and read under if someone says: How do you know that some future generation won't fit the prophecy better than this one? then read the first reply that they give you to say in the book. Believe me it will leave them speechless, and they will surely leave you alone. because most of them are not prepared for you to throw this at them and they will look at it if you show them because it's their own stuff not apostate material.
I find this to be the best way to argue with any active jw when it come to the new light on the generation. I hope any and everyone who still have their "reasoning from the scriptures" book get them out look through them again because all through out the book it talks of the generation of 1914 and how they will be the ones to see the end of this system in their own words. By the way they still use this book.