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Salmon of Knowledge

Salmon of Knowledge 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 Salmon of Knowledge rather than just read about it. In short: The Salmon of Knowledge (Irish: An Bradán Feasa) is a creature in the Fenian Cycle of Irish mythology, sometimes identified with the mythical seer Fintan mac Bóchra who was known as "The Wise" and was once transformed into a salmon. Fenian Cycle The Salmon story figures prominently in The Boyhood Deeds of Fionn, which recounts the early adventures of Fionn mac Cumhaill.

Salmon of Knowledge — main illustration
Salmon of Knowledge — illustration

Key takeaways

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

Reference excerpt

The Salmon of Knowledge (Irish: An Bradán Feasa) is a creature in the Fenian Cycle of Irish mythology, sometimes identified with the mythical seer Fintan mac Bóchra who was known as "The Wise" and was once transformed into a salmon.

Fenian Cycle The Salmon story figures prominently in The Boyhood Deeds of Fionn, which recounts the early adventures of Fionn mac Cumhaill. In the story, an ordinary salmon ate nine hazelnuts that fell into the Well of Wisdom (an Tobar Segais) from nine hazel trees that surrounded the well. By this act, the salmon gained all the world's knowledge. The first person to eat of its flesh would in turn gain this knowledge. The poet Finn Eces (or Finegas) spent seven years fishing for this salmon. Finally Finn caught the salmon and gave the fish to Fionn, his servant and son of Cumhall, with instructions to cook it but on no account eat any of it. Fionn cooked the salmon, turning it over and over, but when he touched the fish with his thumb to see if it was cooked, he burnt his finger on a drop of hot cooking fish fat. Fionn sucked on his burned finger to ease the pain. Little did Fionn know that all the salmon's wisdom had been concentrated into that one drop of fat. When he brought the cooked meal to Finn Eces, his master saw that the boy's eyes shone with a previously unseen wisdom. Finn Eces asked Fionn if he had eaten any of the salmon. Answering no, the boy explained what had happened. Finn Eces realized that Fionn had received the wisdom of the salmon, so gave him the rest of the fish to eat. Fionn ate the salmon and in so doing gained all the knowledge of the world. For the rest of his life, Fionn could draw upon this knowledge merely by biting his thumb. The deep knowledge and wisdom gained from the Salmon of Knowledge allowed Fionn to become the leader of the Fianna, the famed heroes of Irish myth.

Related mythologies

In Irish mythology, several primordial beings that personify old age and ancient knowledge are described as taking the shape of a salmon. Most notably, this includes Fintan mac Bóchra and Tuan mac Cairill. The Welsh Hanes Taliesin (16th c.) has a similar story of how the poet Taliesin received his wisdom, that also involves shape-shifting into the form of a fish. Heinrich Zimmer suggested that the episode may have been transferred from Scandinavia as part of the heritage of the Norse-Gaels. This is supported by further circumstantial evidence regarding Norse motifs in the Fenian cycle, including his suggestion that the name of the Fianna can be traced back to an Irish rendering of Old Norse fiandr "enemies (pl.)" > "brave enemies" > "brave (free) warriors" (Zimmer 1891, p. 15ff),. In the Icelandic Völsunga saga (late 13th century), these motifs also recur: Odin, Loki, and Hœnir slew an otter that they later found to be Ótr, the son of the dwarf Hreiðmarr. The treasure Hreiðmarr was receiving as ransom was then protected by his son Fáfnir, who took the shape of a worm or dragon. On behalf of his brother Regin, Fáfnir was later slain by Sigurð. Regin asked Sigurð to cook Fáfnir's heart for him to eat, but, like Fionn, Sigurð tasted it and gained knowledge of the speech of birds. Thus he learnt about Regin's treachery and confronted him. Similarly, Saxo Grammaticus (Gesta Danorum, V.2.6-V.2.8, 12th c.) describes how Eric acquired eloquence and wisdom by eating the snake-infested stew his step-mother Kraka had prepared for his half-brother Roller. The motif is well-known in European folktales and corresponds to Aarne–Thompson type 673 (KHM 17, see The White Serpent's Flesh), frequently found in Central and Eastern Europe, but also in Scotland, Ireland, Scandinavia, in the Baltic countries and occasionally also outside Europe. As both the majority of fairy tales and the Germanic versions point to a serpent being digested, but not a salmon, it seems likely that the salmon is a substitute for an original serpent.

In popular culture

In the 1973 movie The Wicker Man directed by Robin Hardy, a villager dresses up as the Salmon of Knowledge during the May Day celebrations. In 2019, the Dublin-based Gilla Band released "The Salmon of Knowledge" on their album The Talkies, which takes its title and some thematic content from the folk tale. Patti Smith remembers Salmon story as a source of her inspiration in her childhood. In season 2 of BBC's "Rogue Heroes" television series, the story is told by Paddy Mayne's character as he and another soldier are sitting in a boat.

See also Mead of poetry Hallucinogenic fish

References

Sources The boyhood of Fin mac Cumhal Archived 27 September 2011 at the Wayback Machine In: T. W. Rolleston (ed.) The High Deeds of Finn and other Bardic Romances of Ancient Ireland, G. G. Harrap & Co., 1910, pp. 106–115. The Salmon of Knowledge[link removed] Celtic.org. Retrieved 14 December 2011. The Boyhood Deeds of Finn mac Cumhaill

Illustrations

Salmon of Knowledge illustration
Salmon of Knowledge: Scales on the Big Fish or Salmon of Knowledge sculpture, which celebrates the return of fish to the River Lagan
Scales on the Big Fish or Salmon of Knowledge sculpture, which celebrates the return of fish to the River Lagan

Worked examples

Example 1 — a first encounter with Salmon of Knowledge

Start with the simplest possible case. Write down what Salmon of Knowledge 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 Salmon of Knowledge 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 Salmon of Knowledge 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 Salmon of Knowledge

In research
Salmon of Knowledge 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 Salmon of Knowledge 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
Salmon of Knowledge is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fenian Cycle, Hazelnuts, Irish legendary creatures, so understanding it makes those chapters shorter.
In everyday life
Look for Salmon of Knowledge 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 Salmon of Knowledge in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Salmon of Knowledge 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 Salmon of Knowledge out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Salmon of Knowledge in simple terms?

The Salmon of Knowledge (Irish: An Bradán Feasa) is a creature in the Fenian Cycle of Irish mythology, sometimes identified with the mythical seer Fintan mac Bóchra who was known as "The Wise" and was once transformed into a salmon. Fenian Cycle The Salmon story figures prominently in The Boyhood D…

Why does Salmon of Knowledge 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 Salmon of Knowledge?

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 Salmon of Knowledge.

Tags

  • Fenian Cycle
  • Hazelnuts
  • Irish legendary creatures
  • Legendary fish
  • Medieval legends
  • Medieval literature
  • Salmon
  • Trees in mythology

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