Learn English – Using “that” (or any other word) three consecutive times

grammar

Is it ever correct to use the word that (or any other word) three consecutive times? For example,

By reading Nietzsche I learned that that that does not kill me makes
me stronger.

Best Answer

Your example sentence is correct, but I would rewrite it to avoid difficulty in reading and parsing. For example,

By reading Nietzsche, I learned that what does not kill me makes me stronger.