Of course, and I wasn't suggesting for a minute that not being able to grok something is any reason to give up on it.

It was more my way of excusing myself from having so much difficulty understanding what was happening in the black box without opening it up to investigate fully.

In the meantime, my Mom uses FB (but not Twitter) and doesn't see much from me there because I don't cross-post much. And we're both OK with that.