The author addresses this nicely in an earlier part of the blog book: https://jerf.org/iri/post/2025/fp_lessons_purity/ https://jerf.org/iri/post/2025/fp_lesson

The author addresses this nicely in an earlier part of the blog book: https://jerf.org/iri/post/2025/fp_lessons_purity/ https://jerf.org/iri/post/2025/fp_lessons_purity/