56, larrbeard is 100 percent correct in regards to educated idiots. I too work with engineering, and some of the most educated are punctuation illiterate. If you wouldn't have told us that you were in high school, we would have never of guessed it. The under thirty crowd can usually be spotted pretty quick with the shorthand abbreviations. You've gained a lot of respect from all of us for your well thought out questions. Keep up the good work and shoot for your ambition to teach. You'll be a good one.