I would have used the term 'dork', but this is acceptable as well

You are a GRAMMAR GOD!
If your mission in life is not already to
preserve the English tongue, it should be.
Congratulations and thank you!
How grammatically sound are you?
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It's like a compulsion, really. I get a nervous twitch when I see anyone regularly swap “its” and “it's”[1]. Of all the ones to confuse, how can you confuse those two, since you can easily sound out “it's” to “it is” to see if it makes sense?
I wish there was some way to see what the right answers are.
[1] The occasional indiscretion is to be forgiven, it could have been a typo.