Usage of “that is”

Is the usage of that is correct here? And why is it correct? (main reason for the asking: I have not seen a sentence that is joined by that is)

Out of the experiments, only one is successful, that is, produces same same output in both set of input.


In your question, that is is only a different way of saying: i.e.

“The actual term i.e. is an abbreviation of id est in Latin, which
literally means “that is”. In fact, when I see i.e., I cannot help but
say “that is” in my head.”

Source : Link , Question Author : william007 , Answer Author : Mari-Lou A

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