# Juan Candelario · Exoesqueleto Cerebral (@juanjrcb) on x

- id: koinon:creator:x_juanjrcb
- url: https://koinonlink.com/kol/x/juanjrcb
- schema_version: 1.4

## Identity
- platform: x
- handle: juanjrcb
- platform_url: https://twitter.com/juanjrcb
- website: https://exoesqueletocerebral.substack.com
- entity_type: creator
- person_id: Cross-platform identity not resolved for this creator.

## Reach
- followers: 7301
- following: 1191
- posts_total: 473
- posts_observed: 1
- posts_per_day: 0.077
- account_age_days: 6183
- verified: true
- size_tier: nano

## Engagement
- status: peak_post_only
- peak_post_engagement_rate: 0.00027
- best_post_interactions: 2
- measurement_source: x_post_interactions
- measurement_formula: interactions on one post — likes, or likes + reposts + replies depending on the discovery path (the two are not distinguishable in the stored data)
- comparable_pool: peak_interactions
- status_note: We have only the single best observed post, so no mean exists. peak_post_engagement_rate is an UPPER BOUND, systematically higher than an average — never compare it against an average rate.
- unit_note: engagement_rate and peak_post_engagement_rate are ratios (0-1); avg_interactions_per_post and best_post_interactions are absolute counts. Read status before reading any number: a null rate has several different causes and status says which one applies here.

## Content
- category: software
- subcategory: ai_tools
- category_confidence: 0.9
- category_source: derived_from_recent_content
- topics: Comparación de LLMs vs herramientas médicas aprobadas, Resultados de estudios en Nature Medicine sobre IA diagnósti, Implicaciones regulatorias de IA sin sello clínico
- bio: Tomo lo que haces todos los días y construyo el sistema para que rinda más sin que tú trabajes más. Abogado y COO. Escribo Exoesqueleto Cerebral los martes.

## Audience (inferred)
- status: present
- description: Doctors, healthcare professionals, and AI enthusiasts in medicine following advances in diagnostic tools
- roles: general_ai
- seniority: practitioner
- pain_points: Distinguishing clinically approved AI from more powerful general models in testing, Assessing whether using unregulated tools can improve outcomes without regulatory risks, Staying current with rapidly evolving papers and benchmarks in medical AI
- posts_analysed: 4
- confidence: 0.4

## Commercial (inferred)
- audience_buyer_fit: 0.9
- promotion_intent: 0.8
- open_to_collaboration: false
- contact: Koinon does not publish creator contact details.

## Quality signals
- authenticity_score: 61
- authenticity_basis: engagement_observed
- credibility_score: 76
- flagged_for_review: false
- koinon_bd_grade: A — measures Koinon partner-outreach fit, not creator quality
- interpretation: Signals for triage, not verdicts. A flag means the profile is worth a manual check.

## Evidence
- [x_juanjrcb#23fbb657] Tres IA sin sello clínico le ganaron a dos herramientas médicas aprobadas por el regulador. En todas las pruebas. (https://twitter.com/juanjrcb/status/2072832700873089413)
- [x_juanjrcb#52676875] Nature Medicine, 23 de junio. GPT-5.2, Gemini 3.1 Pro y Claude Opus 4.6 vs OpenEvidence y UpToDate.
- [x_juanjrcb#755040b3] Ojo: midieron pruebas, no pacientes. Pero "aprobado" y "el mejor para tu paciente" dejaron de ser lo mismo.
- [x_juanjrcb#d748458b] https://t.co/1rfVhKr4bd

## Provenance
Every inferred field below carries how it was produced. Facts stay facts; inferences stay inferences.

- audience.description: source_type=ai_inferred, confidence=0.4, freshness_days=60, method=llm_persona_from_recent_content
- audience.roles: source_type=ai_inferred, confidence=0.4, freshness_days=60, method=llm_persona_from_recent_content
- audience.seniority: source_type=ai_inferred, confidence=0.4, freshness_days=60, method=llm_persona_from_recent_content
- commercial.audience_buyer_fit: source_type=ai_inferred, confidence=0.6, freshness_days=79, method=llm_scorer — Relative signal within Koinon indexing, not a market-wide score.
- commercial.promotion_intent: source_type=ai_inferred, confidence=0.6, freshness_days=79, method=llm_scorer
- quality.anomaly_flags: source_type=heuristic, confidence=0.5, freshness_days=112, method=profile_snapshot_and_engagement_ratio_heuristic — Means "worth a manual check", NOT confirmed fraud. Flags can be wrong and are not a verdict about the person.
- quality.authenticity_score: source_type=heuristic, confidence=0.5, freshness_days=79, method=Profile-shape heuristic from a single snapshot (follower count, following ratio, account age, posting volume, verification), reduced for engagement red flags where post engagement was collected. Where only a follower count is available the score saturates at 58. — The input set differs by platform; do not compare this score across platforms.
- quality.koinon_bd_grade: source_type=ai_inferred, confidence=0.5, freshness_days=112, method=llm_partner_fit_classifier + fit_score >= 0.6 AND authenticity >= 60 => A; fit_score >= 0.4 AND authenticity >= 45 => B; else C. authenticity < 30 or a promotional-pattern flag => quarantine. — Koinon partner-outreach fit, not creator quality.
- reach.followers: source_type=observed, confidence=0.95, freshness_days=112, method=platform_profile

## Freshness
- profile_checked_days_ago: 112
- content_analysed_days_ago: 79
- audience_updated_days_ago: 60

## AI retrieval
- indexing_requests: 8
- user_triggered_requests: 0
- note: Being indexed in bulk is not the same as being retrieved to answer a question.

## This profile
- Claim or correct: https://koinonlink.com/claim?k=x_juanjrcb
- Request removal: https://koinonlink.com/claim?k=x_juanjrcb
- Terms: https://koinonlink.com/for-ai