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Synderesis

Synderesis is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Synderesis rather than just read about it. In short: In scholastic moral philosophy, synderesis () or synteresis is habitual knowledge of the universal practical principles of moral action. The reasoning process in the field of speculative science presupposes certain fundamental axioms on which all science rests.

Synderesis — main illustration
Synderesis — illustration

Key takeaways

  • Synderesis belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Synderesis to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Synderesis from memory before moving on to harder problems.

Reference excerpt

In scholastic moral philosophy, synderesis () or synteresis is habitual knowledge of the universal practical principles of moral action. The reasoning process in the field of speculative science presupposes certain fundamental axioms on which all science rests. Such are the principle of contradiction, "a thing cannot be and not be at the same time," and self-evident truths like "the whole is greater than its part". These are the first principles of the speculative intellect. In the field of moral conduct there are similar first principles of action, such as: "evil must be avoided, good done"; "Do not do to others what you would not wish to be done to yourself"; "Parents should be honoured"; "We should live temperately and act justly". Such as these are self-evident truths in the field of moral conduct which any sane person will admit if he understands them. According to the Scholastics, the readiness with which such moral truths are apprehended by the practical intellect is due to the natural habit impressed on the cognitive faculty which they call synderesis. While conscience is a dictate of the practical reason deciding that any particular action is right or wrong, synderesis is a dictate of the same practical reason which has for its object the first general principles of moral action.

History The notion of synderesis has a long tradition, including the Commentary on Ezekiel by Jerome (A.D. 347–419), where syntéresin (συντήρησιν) is mentioned among the powers of the soul and is described as the spark of conscience (scintilla conscientiae), and the interpretation of Jerome's text given, in the 13th century, by Albert the Great and Thomas Aquinas in the light of Aristotelian psychology and ethics. An alternative interpretation of synderesis was proposed by Bonaventure, who considered it as the natural inclination of the will towards moral good. The word synderesis is by most scholars reckoned to be a corruption of the Greek word for shared knowledge or conscience, syneidêsis (συνείδησις), the corruption appearing in the medieval manuscripts of Jerome's Commentary. The term is also used in psychiatric studies, with particular reference to psychopathy.

Notes

External links Medieval Theories of Conscience entry in the Stanford Encyclopedia of Philosophy

Illustrations

Synderesis: St. Jerome in His Study (1480), by Domenico Ghirlandaio. Jerome (A.D. 347–419) used the term syntéresin (συντήρησιν) in his Commentary on Ezekiel to describe the spark of conscience, an early formulation of synderesis.
St. Jerome in His Study (1480), by Domenico Ghirlandaio. Jerome (A.D. 347–419) used the term syntéresin (συντήρησιν) in his Commentary on Ezekiel to describe the spark of conscience, an early formulation of synderesis.

Worked examples

Example 1 — a first encounter with Synderesis

Start with the simplest possible case. Write down what Synderesis claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Synderesis before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Synderesis ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Synderesis

In research
Synderesis appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Synderesis in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Synderesis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Concepts in ethics, Reasoning, Scholasticism, so understanding it makes those chapters shorter.
In everyday life
Look for Synderesis outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Synderesis in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Synderesis means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Synderesis out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Synderesis in simple terms?

In scholastic moral philosophy, synderesis () or synteresis is habitual knowledge of the universal practical principles of moral action. The reasoning process in the field of speculative science presupposes certain fundamental axioms on which all science rests.

Why does Synderesis matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Synderesis?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Synderesis.

Tags

  • Concepts in ethics
  • Reasoning
  • Scholasticism

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