As a philosophy student (you know, physics for dumb people), one of my favorite titles for an article I read was "Is justified true belief knowledge?".
The snow is Siberia debate reminds me of that.
One of my favorite Mark Twain quotes (or was it Will Rogers?) was, "It is not so much what we know that is dangerous, but what we know that is not true." Applies to many we know.
I'll have to check it out. You seem to have taken a good brunt of this discussion also. Do you know the author(s), as it makes the search easier.