insearchof,
The JW canned response will come from the Reasoning book. If you have it good. If not get it.
They don't come up with answers for every argument. They don't need to - they're right regardless of what you argue. They just rely on being right no matter what you say.
It's unfortunate but there it is.
The most they can do is use the CDrom and/or read the Insight and Reasoning book - which all pretty much use the same arguments.