As someone who has recently turned 60 and is already having minor memory issues I'm probably a little more understanding than most of the way Jabba will appear to comprehend, say, the difference between the anthropic principle and the fine tuning argument one minute, and then be confusing them again a few hours later. Unfortunately to keep up with many of the discussions on this board it is necessary to not only understand but retain quite complex information.
I think at some point Jabba is going to have to accept that he has simply left it too late in life to try to wrap his brain round some of the topics he would like to understand. I've already reluctantly accepted that I will never regain the understanding of quantum mechanics I possessed back when I did my maths degree, let alone ever increase it.