P16 · CASE 0009 · POPULATED EVIDENCE RECORD

Are We Alone in the Universe?

OPENCOMPLETE_CLAIMS_SOURCES_ADVERSARIAL

Earth remains the only confirmed inhabited world. Potentially habitable environments and candidate biosignatures justify search, but no extraterrestrial life or technology has been confirmed.

20sources

15claims

10framework dimensions

15adversarial tests

Canonical source basis:
CP1_OBSERVATORY_P16_CASE0009_SOURCE_MAP_AND_EVIDENCE_MATRIX_V0_1_20260731.xlsx
CP1_OBSERVATORY_P16_CASE0009_QUESTION_CHARTER_AND_PUBLIC_MASTER_V0_1_20260731.docx

Claims

Claims retain their original research-state labels. A status is not a probability of truth.

ID	State	Claim	Support refs
C01	STRONG SUPPORT	Earth is currently the only confirmed inhabited world.	S02–S03; S08–S20
C02	STRONG SUPPORT	Planets are common, but the frequency of inhabited planets is unknown.	S01–S05
C03	STRONG SUPPORT	Habitability is evidence about capacity, not occupation.	S02; S09–S10; S19
C04	STRONG SUPPORT	Organic molecules are not uniquely biological.	S04–S05; S08; S10; S20
C05	STRONG SUPPORT	Robust exoplanet biosignature claims require multi-molecule and planetary-context analysis.	S03–S07; S17–S18
C06	STRONG SUPPORT	Current K2-18 b observations do not provide statistically significant evidence for DMS/DMDS.	S06–S07
C07	STRONG SUPPORT	The Sapphire Canyon Mars sample is a potential biosignature, not confirmed life.	S08
C08	STRONG SUPPORT	Europa and Enceladus contain promising habitability ingredients without confirmed life.	S09–S10; S19
C09	STRONG SUPPORT	No technosignature has been independently confirmed.	S11–S16
C10	STRONG SUPPORT	Technosignature null results constrain only defined search dimensions.	S12–S16
C11	STRONG SUPPORT	Cross-team and cross-instrument replication is necessary for historic detection claims.	S03–S08; S12–S17
C12	PROVISIONAL SUPPORT	A confirmed second biosphere would update life prevalence more than intelligence prevalence.	S01–S05; S09–S10
C13	PROVISIONAL SUPPORT	Search selection effects can inflate the perceived importance of anomalies.	S06–S07; S12–S15
C14	STRONG SUPPORT	Communication standards should become stricter as historical significance increases.	S03; S17–S18
C15	OPEN	The prevalence and detectability of extraterrestrial life remain UNKNOWN.	S01–S20

Sources · 20 serialized

ID	Source	Research status
S01	NASA Exoplanet Discoveries Dashboard	ACCEPTED CONTEXT
S02	NASA — Can We Find Life?	ACCEPTED CONTEXT
S03	NASA — Life Detection Resources / CoLD Scale	ACCEPTED METHOD
S04	Schwieterman et al. — Exoplanet Biosignatures Review	ACCEPTED EVIDENCE
S05	Meadows et al. — Oxygen as a Biosignature	ACCEPTED EVIDENCE
S06	Luque et al. — K2-18 b joint JWST analysis	ACCEPTED EVIDENCE
S07	Stevenson et al. — K2-18 b standards of evidence	ACCEPTED PROVISIONAL
S08	NASA Mars 2020 Perseverance	ACCEPTED CANDIDATE
S09	NASA Europa Clipper	ACCEPTED HABITABILITY
S10	NASA Cassini — phosphorus in Enceladus ocean	ACCEPTED HABITABILITY
S11	NASA — Searching for Technosignatures	ACCEPTED CONTEXT
S12	Barrett et al. — 27 eclipsing exoplanets	ACCEPTED NULL RESULT
S13	Pardo et al. — anomaly detection in Breakthrough Listen	ACCEPTED NULL RESULT
S14	Czech et al. — MeerKAT commensal survey	ACCEPTED SEARCH SCALE
S15	SETI Institute — 3I/ATLAS observations	ACCEPTED NULL RESULT
S16	NASA Exoplanet Exploration Program — Technosignatures SAG	ACCEPTED METHOD
S17	NASA Life Detection Knowledge Base	ACCEPTED METHOD
S18	NASA Astrobiology — What is a Biosignature?	ACCEPTED CONTEXT
S19	NASA Europa — Ingredients for Life	ACCEPTED HABITABILITY
S20	NASA Curiosity — large organic molecules on Mars	ACCEPTED CHEMISTRY

Tests / adversarial controls · 15

ID	Failure mode / test	State	Required control
A01	Habitability substitution	ACTIVE	Separate capacity from occupation.
A02	Organic-molecule substitution	ACTIVE	Model abiotic synthesis and contamination.
A03	Single-biosignature absolutism	ACTIVE	Require planetary context and combinations.
A04	Earth exclusivity	ACTIVE	Test broad chemistry and environment.
A05	Contamination blindness	ACTIVE	Use blanks, custody and planetary protection.
A06	Signal-of-interest inflation	ACTIVE	Reject RFI and natural sources first.
A07	Search-completeness illusion	ACTIVE	State multidimensional search coverage.
A08	Drake-equation precision	ACTIVE	Use scenario ranges and assumptions.
A09	Selection/trials neglect	ACTIVE	Report all targets and pipelines.
A10	Intelligence compression	ACTIVE	Preserve nested discovery classes.
A11	Repeatability absolutism	ACTIVE	Require authentication and secondary predictions.
A12	Common-pipeline pseudo-replication	ACTIVE	Map data and pipeline dependencies.
A13	Anthropocentric technology	ACTIVE	Diversify technosignature classes.
A14	Communication inflation	ACTIVE	Use staged terminology and corrections.
A15	UAP conflation	ACTIVE	Require astrophysical/planetary target attribution.

UNKNOWN / unresolved · 4

LIFE-UNK-01 — Frequency of abiogenesis.
LIFE-UNK-02 — Prevalence and durability of biosignatures.
LIFE-UNK-03 — Distribution of complex life and technological lifetimes.
LIFE-UNK-04 — Actual fraction of multidimensional search space examined.

Serialization boundary

This interface does not complete missing research by inference. The current record is COMPLETE_CLAIMS_SOURCES_ADVERSARIAL. Missing source-level or bilingual object-level fields remain absent until they are read from a canonical Observatory artifact.