{"query": "/24 → 2⁸ − 2 = 254 usable hosts", "count": 14, "results": [{"id": "card_v_6667cbff7155", "title": "/24 → 2⁸ − 2 = 254 usable hosts", "shelf": "networking", "surface": "secular", "snippet": "Verdict: HOLDS.\n• networking.subnet_host_count: /24 has 254 usable hosts (matches claim)\nSealed and independently re-checkable: https://narrowhighway.com/s/75c4e49ba527c335c5c03226ddc0c5f22454d9d35393", "authority_tier": "engine", "source": "Verified by the engine — networking", "generated": false}, {"id": "card_theory_network_theory", "title": "Network theory (routing, addressing / CIDR)", "shelf": "theories", "surface": "secular", "snippet": "Network theory (routing, addressing / CIDR) — an engine domain that can touch it: networking. Calibration: seals — subnet masks, address ranges and prefix matches compute exactly. An IP address is spl", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_music_theory", "title": "Music theory (harmonic series, equal temperament)", "shelf": "theories", "surface": "secular", "snippet": "Music theory (harmonic series, equal temperament) — an engine domain that can touch it: music_theory. Calibration: seals — frequencies, intervals and temperament errors compute exactly. A vibrating st", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_antibiotics_resistance", "title": "Antibiotics & antimicrobial resistance (Fleming's own warning)", "shelf": "theories", "surface": "secular", "snippet": "Antibiotics & antimicrobial resistance (Fleming's own warning) — an engine domain that can touch it: medicine. Calibration: map-only — dosing computes (see pharmacokinetics); resistance dynamics are e", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_haber_bosch", "title": "Haber–Bosch nitrogen fixation (bread from air)", "shelf": "theories", "surface": "secular", "snippet": "Haber–Bosch nitrogen fixation (bread from air) — an engine domain that can touch it: chemistry. Calibration: seals — stoichiometry, yield and equilibrium shifts compute. N₂ + 3H₂ ⇌ 2NH₃, run at roughl", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_domchk_networking_claimed_usable_hosts", "title": "Networking: usable hosts", "shelf": "networking", "surface": "secular", "snippet": "A worked check in networking: usable hosts.\n\nGIVEN\n  subnet_prefix = 24\n\nCLAIMED\n  claimed_usable_hosts = 254\n\nTHE ENGINE'S VERDICT\n  networking.subnet_host_count: CONFIRMED — /24 has 254 usable hosts", "authority_tier": "reference", "source": "The verifier's own documented relation, and a run this engine performed against it (deterministic; re-runnable with tools/domain_goldens.py)", "generated": false}, {"id": "card_domchk_cybersecurity_claimed_host_count", "title": "Cybersecurity: host count", "shelf": "cybersecurity", "surface": "secular", "snippet": "A worked check in cybersecurity: host count.\n\nGIVEN\n  cidr_prefix = 24\n\nCLAIMED\n  claimed_host_count = 254\n\nTHE ENGINE'S VERDICT\n  cybersecurity.subnet_hosts: CONFIRMED — /24 → 254 usable hosts (match", "authority_tier": "reference", "source": "The verifier's own documented relation, and a run this engine performed against it (deterministic; re-runnable with tools/domain_goldens.py)", "generated": false}, {"id": "card_works_subnet", "title": "How many hosts fit in a /24", "shelf": "the-works", "surface": "secular", "snippet": "A /24 subnet leaves 8 host bits — 2⁸ − 2 = 254 usable addresses, after reserving the network and broadcast. The daily arithmetic of every network.  Worked & sealed by the engine — /24 → 2⁸ − 2 = 254 u", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}, {"id": "card_src_word_usable", "title": "usable", "shelf": "dictionary", "surface": "secular", "snippet": "usable: (adjective) capable of being put to use — syn: useable · (adjective) fit or ready for use or service — syn: functional, useable, operable, operational · (adjective) convenient for use or dispo", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_power_batteries", "title": "Batteries — the store, and how not to wreck it", "shelf": "energy", "surface": "secular", "snippet": "The battery is your reservoir. LEAD-ACID (flooded/AGM) is cheap but heavy, and you must not regularly drain it below ~50% or it dies young — so a 100 Ah lead-acid battery gives ~50 Ah of usable energy", "authority_tier": "reference", "source": "U.S. Department of Energy / NREL consumer energy guidance (public domain)", "generated": false}, {"id": "card_src_rfc_7196", "title": "RFC7196 — Making Route Flap Damping Usable", "shelf": "rfcs", "surface": "secular", "snippet": "RFC7196: Making Route Flap Damping Usable (May 2014). Status: PROPOSED STANDARD.", "authority_tier": "reference", "source": "The RFC Index (RFC Editor / IETF) — public domain", "generated": false}, {"id": "card_c_bfd860ef895f", "title": "The three doors the disease framework could  ↔ Reading the body's dashboard — HRV, pupil, s", "shelf": "connections", "surface": null, "snippet": "the dashboard signals (HRV, pupillometry, biomarker thresholds) are confounded proxies, usable only as within-person slopes under controlled conditions  — a concord the card itself states; mined + ver", "authority_tier": "engine_derived", "source": "Concordance miner — 2026-07-11", "generated": false}, {"id": "card_n_a735e61f7ca1", "title": "Shortwave (HF) — around the world on the ionosphere's mirror", "shelf": "science", "surface": "secular", "snippet": "3–30 MHz; the 19 m band's wavelength seals at 15 MHz: https://narrowhighway.com/s/d6211f4efb2518c6de145decf57f27b131a01c24ce7841853f395b7bc986c323 . Here the ionosphere's\nF-layer refracts waves back t", "authority_tier": "engine_derived", "source": "Concordance assay — 2026-07-09", "generated": false}, {"id": "card_src_pron_usable", "title": "usable", "shelf": "pronunciation", "surface": "secular", "snippet": "", "authority_tier": "", "source": "", "generated": false}]}