Depends how you define success.
Last time an elder and a rank & file sister sat down with me, I explained what I could and couldn't accept as biblical. My 4 criteria
1. must have at least one scripture to support a teaching.
2. no subtractions, additions, changes in word meanings from that scripture or scriptures
3. no linking scriptures without clear grounds
4. must consider context, textual, situational and historical.
I then asked if they thought that using these criteria might help to reduce doctrinal error.
A definite maybe
I then asked if they knew the difference between exegesis and eisegesis. I gave them an example of eisegesis...putting modern names and dates into a parable.
Once eisegesis was clear I asked them to read and explain several of the primary catasstrophic verses from Revelation 8 concerning the blowing of the first of the 7 trumpets (no clue forthcoming)
Then I read from the Revelation book about Rutherford blowing the first trumpet in a speech given in Ohio in 1922 which allegedly caused this large scale destruction.
Silence, silence, silence...
Then I asked if it was possible that every doctrine that was unique to Jehovah's Witnesses was established by identical interpretive abuse. Examples include resurrection of Peter and Paul in the spring of 1918, rejection of Christendom in the fall, selection of the FDS in April of 1919 etc.
They were quiet, the elder seemingly quite humbled left unwilling to debate or even explore further examples of eisegesis with me.
I knew of course that they would never return.
I only used this strategy twice...both time JWs were unwilling or unable to respond.
Quite sad really