Sounds about right to me
When you get to a point you pretty much know what everyone's going to have to say about a subject, it gets stale. And the things he was really interested in, there just aren't enough people here who could keep up with the math or physics to make it interesting.
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Purveyor of Doc Hope's [link|http://DocHope.com|fresh-baked dog biscuits and pet treats].
[link|http://DocHope.com|http://DocHope.com]