AI FOR DISCIPLINED INQUIRY
Aquinian helps you examine difficult questions through distinction, objection, determination and verification — without asking you to treat the machine’s first answer as authoritative.
The first answer is not the verdict.
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This is the order of an article of the Summa Theologiae, and the order Aquinian works in. The question is Aquinas’s own: ST I, q. 2, a. 3.
Steps I to IV are written for this page to show the shape of a session; Studio’s wording will differ. Step V quotes a real Studio Investigate run. Step VI is a lookup you run yourself. The objections, the reply to the first objection, and the Latin are quoted from the text. Each block is labelled with what kind of text it is.
Does God exist? Not what I am supposed to believe. What can actually be argued?
Aquinas puts the same question as a “whether”: Utrum Deus sit — whether God exists. The form keeps the question open until it has been examined.
Before answering, three distinctions. Each changes what a fair answer can claim.
“It seems that God does not exist; because if one of two contraries be infinite, the other would be altogether destroyed. But the word ‘God’ means that He is infinite goodness. If, therefore, God existed, there would be no evil discoverable; but there is evil in the world. Therefore God does not exist.”
“Further, it is superfluous to suppose that what can be accounted for by a few principles has been produced by many. But it seems that everything we see in the world can be accounted for by other principles, supposing God did not exist. … Therefore there is no need to suppose God’s existence.”
“It is said in the person of God: ‘I am Who am.’ (Exodus 3:14)”
The problem of evil and an early form of “we do not need that hypothesis”. Aquinas opens with the two objections that still carry most weight, and he does not weaken them to make the answer easier.
Translation: Fathers of the English Dominican Province, 1920 (public domain).
God’s existence can be shown in five ways. Each begins from something observed: change; the order of efficient causes; things that can be and not be; degrees of goodness, truth and nobility; and things without knowledge acting for an end. Each ends at a first term, “and this everyone understands to be God”.
“As Augustine says (Enchiridion xi): ‘Since God is the highest good, He would not allow any evil to exist in His works, unless His omnipotence and goodness were such as to bring good even out of evil.’ This is part of the infinite goodness of God, that He should allow evil to exist, and out of it produce good.”
Nature works for an end under the direction of a higher agent. Human reason and will can change and fail. Both are traced back to a first principle that is unchangeable and necessary of itself.
Investigate works the question again, twice: once with the conversation in view, and once without sight of the first answer. It then writes a fresh determination. Agreement between the two workings does not promote a claim. Below: excerpts from a real Investigate run on this question in Studio, trimmed but not reworded. Studio’s full answer is longer.
God exists. His existence is not self-evident to us, but it can be demonstrated from effects better known to us. In this article it is proved in five ways.
Both objections are serious. The first treats an infinite good as leaving no room for its contrary. The second treats a first cause as a superfluous explanation.
The inference from “each thing that can fail, at some time fails” to “if all things could fail, there was a time when nothing existed” is the tightest and most contestable step in the article. It is not a proof that the world had a first moment of duration.
The objection assumed that an infinite good must abolish every subject in which a contrary can exist. The reply is that infinite goodness can order even a privation toward a good that would not otherwise be. Evil is not thereby made good.
The ways show that God is, under names taken from effects. They do not show what God is. Simplicity, and the identity of essence and existence in God, belong to later questions. To read those conclusions back into this article is a mistake.
Whether each route succeeds depends on the metaphysical premises it uses; those premises are argued in their own places, not settled merely by the closing formula of this article.
Check sources on this run This answer cites no https links to check.
No Summa or Scripture citations were parsed from this text.
Each manual check: Manual check required You: Pending
Investigate tests an answer. It does not issue ecclesial judgments or replace competent theological authority.
Studio did not parse the reference out of its own answer in the run above, so the check starts with you: enter the article in Look up.
Lookup result Found in Corpus Thomisticum
Primary text, Latin
Respondeo dicendum quod Deum esse quinque viis probari potest. Prima autem et manifestior via est, quae sumitur ex parte motus.
corpusthomisticum.org/sth1002.html#28318
Text: Corpus Thomisticum, Fundación Tomás de Aquino, used with permission.
Looking up a citation, or opening the Corpus page, is not User verified.
| What you do | Lookup result | Your check |
|---|---|---|
| Look up, or open the Corpus page | Found in Corpus Thomisticum | No decision recorded |
| Press Confirm match | Unchanged | User verified |
| Press Flag discrepancy | Unchanged | Discrepancy |
For web sources an answer cites, Check sources keeps three separate records:
Most AI is built to make a question disappear as quickly as possible. Aquinian is designed to make certain questions harder before it makes them easier. Fluency is not evidence.
Distinguish before concluding.
Define the terms. Keep the adverse reading in view. Separate what is asserted from what is assumed.
Begin in Conversation. Nothing has to be chosen first.
The adverse case is not hidden.
Disputation states the strongest objection before it determines anything, then answers each objection in turn. Investigate puts the determination itself back on trial.
Disputation · Investigate
What cannot be verified stays marked.
Authorities are weighed, not stacked. Check sources keeps what Aquinian retrieved and what you confirmed in separate records. Your judgment is the last step.
Check sources · Look up · How it works
An AI quotation should not become an authority merely because it sounds convincing.
When an answer cites the Summa Theologiae, look up the article from parts I, I-II, II-II or III. Aquinian shows the Latin from Corpus Thomisticum, with attribution and a link back to the source page, and the 1920 English Dominican translation beside it. Scripture can be looked up in the Douay-Rheims. Lookups are free, and run only when you press Look up.
The Corpus Thomisticum text appears with the permission of the Fundación Tomás de Aquino. Permission is not endorsement.
Opening a source records it as opened, and your check stays pending. Press Confirm match when it matches, or Flag discrepancy when it doesn’t. Aquinian’s check and yours are always shown separately.
Conversation is home. The other forms are there when the question needs them: to dispute it, to teach it, to read a cultural object, or to make it public. Investigate is the return through any of them.
Watch the introduction
Begin with a question.
Home · the home state
The question is still becoming clear.
Stay here while terms are moving, distinctions are emerging, or the next question depends on the last answer.
When the question requires a form · a form the inquiry can take
The opposing case deserves its full strength.
Use this when an answer is not serious unless the best objection has first been allowed to stand.
When the question requires a form · a form the inquiry can take
Understanding now has to become teachable.
Use this when an inquiry must acquire sequence, proportion, and a form another mind can follow.
When the answer itself must be tested · the determination re-examined
The determination goes back on trial.
Use a second pass when agreement is not enough and the first conclusion must survive examination.
Investigate tests an answer after the first pass. It does not issue ecclesial judgments or replace competent theological authority.
When the question requires a form · a form the inquiry can take
The object says more than it explicitly argues.
Use this when a film, song, law, essay, or cultural artefact needs its premises uncovered before it can be judged.
When the question requires a form · a form the inquiry can take
The inquiry is ready to become public.
Use this when private reasoning must become a structured argument that can stand in front of another audience.
Aquinian should strengthen your judgment, not ask for your deference. It helps you understand St Thomas; it does not ask you to replace him with Aquinian. Aquinian is an intellectual formation tool. It is not an ecclesial authority, priest, confessor, or substitute for competent theological, spiritual, or pastoral counsel.
“It will not weaken an adverse text to make a harmony.”
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The lemma is given before a translation. Translations, quotations, manuscript variants and attributions should still be checked against authoritative editions before formal use.
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Aquinian can remain a standalone study. With an FIA Plan, you can deliberately send a defined brief to another specialist desk when the question crosses into law, finance, medicine, strategy, or another discipline. The study itself does not silently travel between desks.
Learn about the FIA Plan →The Summa Theologiae is read one article at a time. Begin with the guide: the parts, the method, and where to start. Then open a single worked article and take it in order — objections first, then the determination. Five articles are explained here; two short pages sit beside them if you are asking whether the Summa is worth reading, or what Thomistic means. Each guide ends with a question to take into Aquinian, and a link to the Latin. Aquinian is a study companion. It is not a priest and does not become authority.
An AI environment for disciplined inquiry in theology and philosophy, structured by the Thomistic method. It distinguishes the terms, gives objections their full weight, re-examines its own determinations, and lets you inspect what they rest on.
It is modeled on the method of St. Thomas Aquinas, in fidelity to the Catholic Magisterium. It is not St. Thomas Aquinas.
Aquinian (Aquinian Studio) is made by FIA Labs, a DBA of Federated Intel AI LLC. It is one of the FIA Labs desks at federatedintel.ai and lives at aquinian.com.
No. Aquinian is an intellectual formation tool. It is not an ecclesial authority, priest, confessor, or substitute for competent theological, spiritual, or pastoral counsel.
A chatbot is built to give you a fluent answer. Aquinian is built to put the answer on trial.
It makes the question precise, states the strongest objection before determining anything, and with Investigate works the question again — once without sight of the first answer — before saying what the argument shows, and what it does not. Check sources keeps what Aquinian retrieved and what you confirmed in separate records.
Investigate works your question twice more: once with the conversation in view, and once without sight of Aquinian’s first answer. It then writes a fresh determination that says what the argument shows, and what it does not. Agreement between the two workings does not promote a claim. It spends more credits than a single answer and is charged only when it lands. It does not issue ecclesial judgments.
Begin in Conversation. Take a form when the question requires it: Disputation, Lecture, Cultural Diagnosis, or Talk / Article.
When the first answer must be tested, Investigate. Attach a note, an encyclical, or an image. Speak an answer. Work hands-free when you cannot look at the screen.
Aquinian converses in more than fifty modern languages and reads and writes Latin, Ancient Greek, Biblical Hebrew, and Biblical Aramaic.
The lemma is given before a translation. Language quality may vary by task, and sources should be checked before formal use.
No. Sign in and try the study with 150 free credits, no card.
The seat pays the house. Credits pay only for work that landed — a stopped or empty run is refunded.
Membership is $15/month and includes 900 credits that reset with the month. Extra packs start at $10 for 1,000 credits and do not expire. Cancel anytime.
Aquinian is governed against fabricated quotations, citations, and attributions, and marks what it has not inspected.
Named authorities, editions, and doctrinal claims should still be checked against primary sources before formal use.
Open Check sources after an answer (you need to be signed in). You will see two independent records for each cited link: what Aquinian retrieved and matched from the page text, and what you confirm. Neither layer proves the other.
Retrieve cited pages is free. Wording overlap is labelled Text overlap (preliminary — not AI verified) and is never AI verified. Deeper AI match spends Ask credits on the retrieved excerpt only and is the only path that can yield AI verified. Opening a link records it as Opened and leaves your decision Pending; that is not User verified. Press Confirm match to record User verified, or Flag discrepancy to record Discrepancy.
The in-app Help page and this site’s Help: Check sources explain the steps in full.
Yes. In Check sources, Look up or Look up all fetches a single cited article or passage and includes a link back to the source.
A Summa article in parts I, I-II, II-II, or III may show Found in Corpus Thomisticum for the Latin — Text: Corpus Thomisticum, Fundación Tomás de Aquino, used with permission — and Found in Summa (Dominican 1920 tr.) for the English. Scripture may show Found in Douay-Rheims. Looking up a citation, or opening the Corpus page, is not User verified.
Yes. Compose lecture turns a conversation into slides, each with a thesis, points and speaker notes. You can present them, have the notes read aloud, and add an illustration to any slide or to the whole lecture.
Conversations and lectures can be saved as Markdown or PDF.
Yes. Hands-free is a live spoken conversation for when you cannot look at the screen, and what is said is written into the conversation. It is a voice companion, lighter than a written answer. For the full method, ask or investigate in writing afterwards.
You can also dictate a question, attach a recording to be transcribed, or have any answer read aloud.
Yes, as a study companion. Ask about a question or article in the language you think in, and Aquinian distinguishes the terms, orders the authorities, and can put the reading into the form of a Disputation or a Lecture. It is modeled on the method of St. Thomas Aquinas. It is not St. Thomas Aquinas, and named passages and editions should be checked against primary sources before formal use.
The disputation (disputatio) is the heart of the scholastic method, and the form Aquinas used in the Summa Theologiae: a question, the strongest objections, a contrary authority, a determination, and replies to each objection. In Aquinian, Disputation is the form to take when an answer is not serious unless the best objection has first been allowed to stand.
Thomism is the philosophical and theological tradition that follows St. Thomas Aquinas. It holds that faith and reason do not contradict each other, and it reasons by distinction: act and potency, essence and existence, natural law, and analogy. Aquinian reasons after the manner of Aquinas, in fidelity to the Thomistic tradition. It can reason with authority. It does not become authority.
What is Thomism? A short introduction · How to read the Summa Theologiae
No. Aquinian is not a chatbot with classical language applied afterward. It reasons after the manner of Aquinas, in fidelity to the Thomistic tradition: structured reasoning, ordered authority, source discipline, and Investigate, which puts its own determination back on trial. The first answer is not the verdict. Aquinian can reason with authority. It does not become authority.
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Question. Distinguish. Object. Determine. Investigate. Verify.
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