{"id":"solutions-are-pure-functions","text":"Solution methods are pure — no state mutation, no side effects, same inputs always produce the same output. The `Solution` class carries no instance state.","truth_value":"IN","source":"entries/2026/06/06/check-if-two-string-arrays-are-equivalent-solution.md, entries/2026/06/06/check-if-word-equals-summation-of-two-words-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"solutions-are-pure-functions","truth_value":"IN","reason":"premise"}]}}