Sic et Non

Quick Facts

• Full title: Sic et Non, usually translated as Yes and No
• Author: Peter Abelard
• Date: early 1120s, with later versions in the 1120s and early 1130s
• Language: Latin
• Form: a collection of 158 theological questions with authorities on both sides
• Main setting: the cathedral schools of twelfth-century France
• Main job: train students to read authority with logic, context, and careful distinctions

The Problem

Medieval Christian students inherited a huge library of respected texts: the Bible, Church councils, and major writers such as Augustine, Jerome, Ambrose, and Gregory. These writers were treated as authorities. That means they were not just random opinions. They were serious witnesses to Christian teaching.

The problem was that authorities sometimes seemed to disagree. One passage might appear to say "yes" to a theological question, while another passage seemed to say "no." Do you pretend the conflict is not there? Do you pick your favorite authority and ignore the rest? Do you say all tradition is useless?

Abelard's answer is more interesting: slow down and learn how to read. A contradiction is not always a disaster. Sometimes the same word is being used in two different senses. Sometimes a writer is quoting someone else, not stating his own view. Sometimes the context changes the meaning. Sometimes the question itself needs to be split into smaller questions.

That is the basic problem of Sic et Non: how can a faithful student face apparent contradictions in sacred and respected texts without becoming either gullible or reckless?

In One Minute

Sic et Non is Abelard's workbook for intellectual honesty. He lines up authoritative quotations under 158 questions. Some quotations support a "yes" answer. Others support a "no" answer. Then he mostly refuses to solve the problem for the reader.

That is the point. Abelard wants students to practice dialectic, meaning disciplined argument through questions, objections, and replies. The student has to ask: are these authorities really contradicting each other, or are they using words differently? Is one passage literal and another figurative? Is one writer speaking in his own voice, or reporting someone else's view?

The book does not say, "throw away authority and believe only reason." It also does not say, "stop thinking and repeat old sentences." It says authority needs interpretation. Respecting a source means doing the hard work of understanding what it actually means.

The Main Argument

Sic et Non is not a normal treatise with a neat thesis at the end. Its argument is built into its structure. Abelard creates a situation where the reader cannot stay passive. If respected authorities seem to disagree, the reader has to investigate.

The title means "Yes and No." That is exactly how the book works. Abelard poses questions, then gathers passages that seem to answer yes and passages that seem to answer no. Some of the early questions are about faith, reason, unseen things, knowledge, belief in God, and divine unity. These are not small classroom puzzles. They are central theological issues.

The prologue gives the method. Do not rush to accuse the saints of error. First ask whether you have understood them correctly. Maybe a word has more than one meaning. For example, "faith" can mean trust in God, but it can also mean the content of what Christians believe. A question like "Does faith need reason?" may get different answers depending on which sense of "faith" is being used.

Abelard also pushes students to check context. A sentence can look clear when it is pulled out by itself and become more complicated when read in place. A writer may also be presenting another person's opinion, using ordinary speech, speaking figuratively, or revising an earlier view. The reader's job is not to flatten all of that into a slogan.

So the main argument is practical: real understanding requires questions. A good reader does not worship words blindly, and does not dismiss authority casually. A good reader tests meanings, compares passages, draws distinctions, and looks for the best way to make sense of the whole.

This is why Sic et Non became important for Scholasticism. Later scholastic writing often begins with objections, sets authorities against each other, gives an answer, and then replies to the objections. Abelard did not invent every part of that method, but he helped make it sharp, teachable, and central.

Key Ideas With Examples

• Authority: a trusted source that carries weight in an argument. In Abelard's world, Scripture and the Church Fathers were authorities. But authority does not remove the need to interpret. If Augustine says one thing and Jerome seems to say another, the student has to ask what each one meant before deciding there is a real clash.

• Dialectic: disciplined reasoning through opposing claims. It is not just arguing for fun. It is a method for testing a question by hearing the strongest "yes" side and the strongest "no" side. Example: if the question is whether faith should be completed by reason, a dialectical reader gathers the best passages for both answers and then asks what kind of reason and what kind of faith are being discussed.

• Distinction: a careful split that removes confusion. If one sentence says "faith does not need proof" and another says "faith seeks understanding," those may not contradict. The first may reject proof as a condition for trusting God. The second may defend study after faith has already begun. Same word, different job.

• Apparent contradiction: a conflict that looks real at first but may disappear after careful reading. Abelard's point is not that contradictions never exist. His point is that you do not know whether they exist until you check wording, context, purpose, and speaker.

• Question method: the habit of turning a topic into a precise question. Instead of saying "faith and reason are complicated," Abelard asks direct questions such as whether faith needs reason or whether unseen things can be known. A precise question gives the mind something to work on.

• Reason and faith: for Abelard, reason is a tool for understanding faith, not a replacement for faith. The danger on one side is anti-intellectual laziness: "do not ask questions." The danger on the other side is arrogant rationalism: "accept only what I can prove by my own reasoning." Abelard tries to hold the middle.

• Scholastic exercise: a classroom training device. Because Abelard often leaves the conflicts unresolved, the book works like a set of exercises. The student has to practice the craft. This is closer to a problem book in logic than to a finished theological encyclopedia.

Why It Matters

Sic et Non matters because it helped turn disagreement into a method. That is a big deal. Instead of treating contradictions as embarrassing mistakes, Abelard made them useful. A clash between authorities became the starting point for inquiry.

It also helped shape the medieval school style that later becomes familiar in writers like Thomas Aquinas: state the question, list objections, cite authorities, give an answer, then reply carefully. Aquinas is much more systematic than Abelard, but the family resemblance is obvious.

The work also shows Abelard's larger personality as a thinker. In Ethics, he makes moral responsibility depend on careful distinctions between desire, action, and consent. In Historia Calamitatum, he presents his life as one long fight inside the schools and monasteries of his time. Sic et Non belongs to that same world: sharp questions, public argument, danger, ambition, and the belief that sloppy thinking is not piety.

The modern lesson is still useful. When two serious sources seem to disagree, do not immediately assume one is stupid or corrupt. Ask what question each source is answering, what its key words mean, and whether the disagreement is real or only apparent.

Proponents, Critics, and Opponents

The main proponents were Abelard's students and the later school culture that learned to make argument formal. The method helped create a disciplined classroom style: questions, authorities, objections, distinctions, and replies. Scholasticism did not reduce theology to logic, but it did make logic part of serious theological education.

The deeper background is the Latin logical tradition associated with Boethius. Abelard inherits a world where Aristotle's logic had been transmitted, commented on, and used as a tool for thinking clearly about language and argument.

The critics were the anti-dialecticians, especially figures like Bernard of Clairvaux, who worried that applying logic to sacred doctrine could become proud, clever, and spiritually dangerous. Their fear was not totally random. A student could use dialectic as a way to show off or tear down tradition.

Abelard's own answer is that bad reasoning is not fixed by no reasoning. The better answer is disciplined reasoning: respect the authorities, ask clear questions, define terms, and do not pretend you understand a sentence before doing the work.

Related Pages

• Peter Abelard
• Boethius
• Scholasticism
• Thomas Aquinas
• Ethics
• Historia Calamitatum