correctness in language

I've been really impressed by an online Spanish program I've been working through via a local community college. It's called "Speed Spanish," and I get the impression it's been around for a while. I like it. I'm into Speed Spanish III now, and the creator of the program, Dan Mikels, has said some things that impressed me so much I've been sharing them all over the place (as missroserose can attest to). AND NOW I SHALL SHARE THEM HERE.

In any language, there are certain things that are extra di...