Other "biphasic"-like aspects of programming languages and code: - Documentation generated from inline code comments (Knuth's literate programming) - Test cod

Other "biphasic"-like aspects of programming languages and code: - Documentation generated from inline code comments (Knuth's literate programming) - Test code We could expand to - security (beyond perl taint) - O(n) runtime and memory analysis - parallelism or clustering - latency budgets And for those academically inclined, formal language semantics like https://en.wikipedia.org/wiki/Denotational_semantics https://en.wikipedia.org/wiki/Denotational_semantics versus operational and others..