{"id":"bloom-filter-len-counts-insertions","text":"`BloomFilter.__len__` counts total `add()` calls, not distinct items — adding the same item twice yields `len() == 2`, unlike `CountingBloomFilter` which has the same property tracked separately","truth_value":"IN","source":"entries/2026/05/29/bloom-filter-test_bloom_filter.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"bloom-filter-len-counts-insertions","truth_value":"IN","reason":"premise"}]}}