Another tactic that can be used with them is to never agree to the obvious. You don't deny the obvious. But you never personally agree to it.
The JW mindset uses a stepping stone type of logic. They state some 'fact,' get you to agree to it, and then move on to their next step in their logic. Once you've agreed to the 'fact,' whatever it is, they proceed in their logic. What you have agreed to is, in their minds, now established.
You can disrupt their 'logic' by not personally agreeing at some obvious point. You don't deny the obvious. You simply never agree to it.
For example, Bobcat is not on the mid-week TMS/CLAM. So Brother Elder approaches him about it
"Brother Bobcat, when you gonna get back on the school?"
"What are you talking about?
" You're not on the school."
"I'm not?"
" Yea, your not!"
"Well, believe what you want."
"But you're not!"
"If you say so."
He might accuse you of "saying" the reverse:
"So you're saying you are on the school?"
"When did I say that?
And on and on. After a while Brother elder tires and moves on.