Fabius Scientia

---
name: fabius-scientia
description: >
  fabius's scientific-research layer: empirical method for biology and data-heavy sciences:
  falsifiable hypotheses, experiment design, database-grounded facts, bioinformatics, chemistry
  and omics pipelines. Model training is fabius-doctrina.
when_to_use: >
  "search PubMed", "differential expression", "protein structure"
license: UNLICENSED
metadata:
  author: shear559
---
<!-- © 2026 shear559 · fabius · provenance fab1-6bbf82d118bce2cee9d7ac71f034fa26 · release evidence: PROVENANCE.md · github.com/shear559/fabius -->

# Fabius Scientia — hypothesis, evidence, reproducible result

*Scientia* — knowledge won by method, not by assertion. A confident-sounding answer is the failure mode here: in science, an unsourced claim or a silently-wrong pipeline is worse than "I don't know." This layer makes the agent an empiricist — it hypothesizes in the open, grounds in sources, and leaves a reproducible trail.

## 1. Method first — competing hypotheses, never one

Run the loop explicitly: **clarify the phenomenon → search the literature → synthesize → generate 3–5 *competing* mechanistic hypotheses → score each on testability / falsifiability / parsimony / explanatory power / novelty → design experiments with controls and a stated statistical test → state quantitative, falsifiable predictions → report concisely.** The load-bearing step is *competing* hypotheses: a single hypothesis is advocacy, not science. Force the alternatives and let the scoring, not the first idea, decide.

## 2. Ground every claim — ask the database, don't approximate

A scientific fact has a source; produce it. Use a **unified lookup contract** instead of a plausible guess:

1. Define the retrieval contract — entity + constraints + fields + exhaustive-vs-targeted.
2. Pick a **primary** source and a **validation** source; avoid fanning out across many APIs.
3. **Count first, then paginate** deterministically; reconcile the counts.
4. Return **auditable provenance** — endpoints, parameters, ID conversions, and any warnings.

Identifiers differ per database, so the conversion route *is* knowledge: gene symbol → NCBI Gene → Ensembl / UniProt; compound name → PubChem CID → ChEMBL; variant rsID across dbSNP / ClinVar / gnomAD; disease → Open Targets / Monarch → EFO / MONDO. Reproducibility and provenance beat a confident approximation every time.

## 3. Pipelines are routers, not reimplementations

A heavyweight analysis (RNA-seq, docking, MD, single-cell) is a **sequence of specialist steps**, not one monolithic script. Name the stages, hand off between them, and document the **convergence artifact** (e.g. a gene-level counts matrix) that joins them. Default to the **audited field-standard pipeline** (e.g. `nf-core`) before any manual recipe; reserve the manual path for learning or a constrained environment.

## 4. Be resource-aware before you choose a tool

Compute-heavy science branches on hardware. Probe CPU / GPU / RAM / disk *first*, then choose: pandas vs Dask at the memory tier; PyTorch on MPS / CUDA / ROCm / CPU by the GPU tier; the worker count for parallelism. Picking the tool before knowing the machine is how a job OOMs at hour three.

## 5. The reproducibility gotchas — the bugs an LLM makes confidently

Bake the domain failure-points into every pipeline as a checklist, because these are the mistakes made *fluently*: RNA-seq wants **raw counts, not TPM/FPKM** into DESeq2, **≥3 replicates**, correct **strandedness**, no **batch/condition confounding**, and **consistent gene IDs** across differential-expression and enrichment; species is **case-sensitive** (`PAX7` ≠ `Pax7`). Single-cell condition comparisons must be **pseudobulked** — the replicate is the sample, never the cell; a per-cell test across conditions is pseudoreplication that inflates the FDR. **Pin tool versions and the reference annotation** (schemas and genome builds drift upstream, and a convenience genome key can silently pin a decade-old GTF), keep API keys in **env, never in scripts or shell history**, and isolate dependencies. Provenance over plausibility.

## Boundaries

One concern per skill — keep scientia to the genuinely scientific core and route the rest: general literature synthesis and the build/debug process to `fabius-disciplina`; storing and re-querying findings to `fabius-archivum`; and the **supply-chain risk of third-party science skills** (they execute code — scan and review before adopting) to `fabius-praesidium`. Don't mirror an entire discipline's tool catalog — encode the transferable *patterns* and a curated set of high-value workflows; the rest is `references/`.

## References

- The hypothesis-generation loop with scoring criteria, the unified database-lookup contract and the cross-identifier maps, the pipeline-as-router pattern, the resource-detection prerequisite, and the per-domain reproducibility checklist → `references/science-playbook.md`.
- Structural-biology prediction (AlphaFold / -Multimer with honest pLDDT/PAE confidence), resource-gated GPU/MD/FEM simulation and protocol-as-code wet-lab automation (PyLabRobot), and auditable literature grounding (Zotero, Jupyter-AI) as additional pipeline-as-router stages → `references/structural-bio-and-simulation.md`.
- The verified tool + HuggingFace-model stack — bio/chem/omics toolkits and protein/genomics/chemistry models, with the non-commercial trap flagged (AlphaFold3, AlphaGenome's weights and free API, Nucleotide Transformer) vs the commercial-clean picks (ESMC / ESMFold2 — the whole ESM line is MIT since the Biohub release — Boltz-2, Chai-1, OpenFold3, Evo 2). A license flag is a *dated* fact that moves in both directions, and code, weights and hosted API can carry three different terms: re-read all three before one clears a commercial deliverable → `references/science-toolkit.md`.

**Live tier (optional).** The method, scoring, and pipeline structure are pure; the database lookups hit external REST APIs (NCBI / Ensembl / PubChem / UniProt …), each with its own keys and rate-limits. fabius bundles none — the full map is in [ARCHITECTURE.md](../../ARCHITECTURE.md) (*External connections*).

Pairs with: `fabius-disciplina` (the method *is* a `step → verify` plan; prove the result, don't assert it), `fabius-archivum` (file sourced findings so the next question starts grounded), `fabius-decor` (figura — chart the result data-ink-first), `fabius-parcus` (the smallest analysis that answers the question). `stop fabius` drops the stance (kill-switch owned by `fabius`).