The languages whose grammar is the empty string. All is syntax error.
Replying to @CauseOfProblem
@CauseOfProblem @FrameOfStack All is semantics error: https://www.goodreads.com/quotes/30560-every-word-is-like-an-unnecessary-stain-on-silence-and …
9:49 AM - 13 Sep 2015
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