science

Mental fact

Mental fact 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 Mental fact rather than just read about it. In short: Mental facts include such things as perceptions, feelings, and judgments. Mental facts are ultimately caused by physical facts, in that mental facts depend on physical and biological functions which are required for consciousness.

Key takeaways

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

Reference excerpt

Mental facts include such things as perceptions, feelings, and judgments. Mental facts are ultimately caused by physical facts, in that mental facts depend on physical and biological functions which are required for consciousness. The physical and biological processes which are necessary for consciousness enable conscious individuals to recognize physical and mental facts. Thus, mental facts are based on physical facts, and both physical and mental facts are required for the construction of social reality. According to John Searle, mental facts may be intentional or nonintentional, depending on whether or not they are directed at something.

See also Brute fact is and ought problem - the distinction between factual claims and value or normative claims matter of fact and matter of law Vertiginous question

Notes

Worked examples

Example 1 — a first encounter with Mental fact

Start with the simplest possible case. Write down what Mental fact 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 Mental fact 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 Mental fact 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 Mental fact

In research: Mental fact 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 Mental fact 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: Mental fact is common in secondary-school and first-year university syllabi. It links to neighbouring topics Concepts in the philosophy of language, Concepts in the philosophy of mind, Consciousness, so understanding it makes those chapters shorter.
In everyday life: Look for Mental fact 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 Mental fact in 20 minutes

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

Frequently asked questions

What is Mental fact in simple terms?

Why does Mental fact 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 Mental fact?

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 Mental fact.