The doctor is in: actor Kelsey Grammer announced his arrival in the Twitterverse with the below message on June 30.

Since then, he’s been keeping his promise of enlightening Twitter users about the finer points (or, in some cases, the basics) of proper grammar by correcting poorly-crafted tweets.

We imagine this is just what Doctor Frasier Crane would have done, had Twitter existed in 1999. His (imagined) response in GIF form after the jump.

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