science

Sybil (cat)

Sybil (cat) 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 Sybil (cat) rather than just read about it. In short: Sybil (c. 1999 – 27 July 2009) was a civil servant and cat living at 10 and 11 Downing Street who was employed as the Chief Mouser to the Cabinet Office as the pet of the chancellor of the Exchequer, Alistair Darling, and his wife, Margaret. When introduced in September 2007, Sybil was the first cat employed at Downing Street as chief mouser since Humphrey, who retired in November 1997.

Key takeaways

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

Reference excerpt

Sybil (c. 1999 – 27 July 2009) was a civil servant and cat living at 10 and 11 Downing Street who was employed as the Chief Mouser to the Cabinet Office as the pet of the chancellor of the Exchequer, Alistair Darling, and his wife, Margaret. When introduced in September 2007, Sybil was the first cat employed at Downing Street as chief mouser since Humphrey, who retired in November 1997. Six months after moving Sybil, who did not adjust well to life in central London, she was moved to the home of one of the Darlings' friends; she died there on 27 July 2009 after a short illness.

Early life and career Sybil was born around 1999 and was named after Sybil Fawlty, a character in the BBC sitcom Fawlty Towers. Several publications described her as being of Scottish origin. She was moved from the chancellor of the Exchequer Alistair Darling's family residence in Edinburgh to 11 Downing Street in the summer of 2007, and employed as chief mouser to the Cabinet Office in September of that year. A spokesman for the prime minister, Gordon Brown, said in a press briefing that he "[understood] Mr and Mrs Darling have a cat and it has recently been brought to Downing Street", and that Brown and his wife, Sarah, "do not have a problem with it". Unlike her predecessor Humphrey, who was given £100 per year after his retirement, Sybil did not receive any money from the Cabinet Office to cover food and veterinary costs, with the Darlings covering those expenses. Sybil was the first cat at Downing Street since Humphrey was removed in November 1997, possibly because of Cherie Blair's reported aversion to cats. Upon her arrival The Daily Telegraph stated that those who had written to the Treasury concerning Sybil's welfare had received a "souvenir photo" of her in return. On 13 September 2007, two days after her introduction, the former prime minister Margaret Thatcher met Sybil during a visit to 10 Downing Street. In March 2008 Sybil was prohibited from hunting mice in the Treasury because of maintenance regulations restricting the use of animals for pest control.

Retirement and death Six months after moving to Downing Street, Sybil, who did not adjust well to life in central London, was moved to the home of one of the Darling family's friends in London. On 27 July 2009 she died after a short illness; the chancellor's spokeswoman announced that Sybil had died at the Darlings' friend's home in London.

Worked examples

Example 1 — a first encounter with Sybil (cat)

Start with the simplest possible case. Write down what Sybil (cat) 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 Sybil (cat) 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 Sybil (cat) 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 Sybil (cat)

In research: Sybil (cat) 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 Sybil (cat) 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: Sybil (cat) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1999 animal births, 2009 animal deaths, Chief mousers to the Cabinet Office, so understanding it makes those chapters shorter.
In everyday life: Look for Sybil (cat) 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 Sybil (cat) in 20 minutes

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

Frequently asked questions

What is Sybil (cat) in simple terms?

Why does Sybil (cat) 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 Sybil (cat)?

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 Sybil (cat).