On Sun, 26 May 2013 14:49:55 +0000, Danny D wrote:

My dad taught me that if it can't be explained, it isn't
understood. For example, what a tangent?

Ooops. "What's a tangent?"

Typos *do* creep into my text, so I apologize for making it
harder to read (I generally edit mistakes out before posting;
but sometimes I am remiss).