Math Behind Software
summary
Mostly theoretical math that explains why certain APIs return true on empty collections: proves vacuous truth (universal statements over empty sets evaluate true) then applies it to code examples — Java Stream's allMatch returns true, JavaScript's Array.prototype.every and collection .all in Python/Kotlin and Neo4j all behave the same. Shows IntelliJ's simplification to literal true, cites logic quantifier ∀, and notes this is a language-agnostic semantic consequence rather than a bug.
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