Respond.
I my self thought at one point it was a waste of time, but the more you talk to witness friends and family about the problems you see they (meaning the overseers, HQ) will collectively observe there is a serious discord in the USA and many other countries in how witnesses good standing/fading ones view the religion we are in. A few days ago I talked to a MS trained friend who was in town about my low meeting attendance being the results of problems I see with our religion he disagreed on many issues and many times brought up better understanding policy but never the less there were some issues he never knew of. When asked the 64thousand dollar questions if I felt witnesses are the true religion, I answered I had not examined all the thousands of religions that exist, but to keep a communication open for future debates I told him that I felt we did.
Use the replies from this knowledgeable bunch to stimulate yours dad’s intellectual facets.