I agree with Apognophos. He is sitting on the fence. He needs some help to break out of that 'comfort zone'. The organ transplant issue might be a good topic to encourage him to investigate.
I don't agree with the don't push it suggestions. Why make the children suffer for possibly several more years especially when he isn't even fully on-board? Maybe you should read the scripture JW's often refer to when they have to deal with fence sitters...