Is it a regexp? I'm thinking if we could come up with a especially dense writing style that needs quadratic time to fully understand a sentence. Like you read a

Is it a regexp? I'm thinking if we could come up with a especially dense writing style that needs quadratic time to fully understand a sentence. Like you read a sentence of N words and get only a surface level meaning. Then you re-read it and understand a bit more. Repeat it about N times and you get the full picture.