give up before you begin................sounds gloomy... but take it from me... all hope is futile
I'd tend to agree with Free@Last, unless you want to undertake this challenge for the hell of it (if sparring with words is your idea of fun).
It takes so much evidence, step-by-step, to disprove any major doctrinal point, and they will "tune you out" before you get far enough to prove anything. All the past facts are buried away in those book of "old lite". They only pay attention to "new lite". All the changes are viewed by JWs as "progress" guided by Holy Spirit. Changes in JW doctring are a GOOD THING compared to Christendom who remains stuck in her ancient traditions (of false doctrine) and refuses to make the necessary changes to be pleasing to God.
This is a sample of the reasoning you can expect.
Good luck. (Oops! Did I say luck?)