tx, it sounds to me like you came into this thing with just the right balance of skepticism to not settle for the first opinion (or the 2nd or 3rd ) & the willingness to educate yourself about something so critical to the future of your young'n...here's hoping for the best for yours, mine is almost 23 & still we struggle to bring him up to speed with the real world...

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If the theory does not conform to the facts, then the facts must be discarded.

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Never argue with an idiot. He'll drag you down to his level, & beat you with experience.