Tag Archive | phrase and fable

That that is is that that is not is not is that it it is

That that is is that that is not is not is that it it is is an English word sequence demonstrating syntactic ambiguity. It is used as an example illustrating the importance of proper punctuation.

The sequence can be understood as either of two sequences, each with four discrete sentences, by adding punctuation:

That that is, is. That that is not, is not. Is that it? It is.

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