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Philosophy · 02 / 08

Truth and science: belief and justification

Final-year concepts · Worked example and 4 exercises with solutions, at your pace.

Need a foundation?Philosophy: construct a problem
UnderstandSee an exampleGuided exercise3 progressive challenges

The principle, simply

Distinguish belief, reasons for belief and what makes a statement true. Strong conviction is not proof. Scientific inquiry tests hypotheses against observations and criticism, using models and methods. Acknowledging limits does not imply all opinions are equally justified.

THE PICTURE TO REMEMBERTruth and science: belief and justification
  1. 01Claim
  2. 02Reasons
  3. 03Testing
  4. 04Justified revision

WORKED EXAMPLE

From principle to reasoning

A confirmed prediction strengthens a hypothesis, but different explanations can fit one observation. Examine further tests and coherence.

Solve a problem in this subject

  1. Distinguish concepts

    Define terms in context. Test two meanings with examples; a distinction often reveals the problem.

  2. Expose a difficulty

    State a plausible answer and a serious objection. Explain why each is defensible and how their tension concerns the exact question.

  3. Argue and examine

    Connect premises and conclusion. Explain how an example supports the reasoning and which conditions limit it.

  4. Develop a progression

    Each next answer should address the previous limit. Conclude from your reasoning without inventing author quotations.

YOUR TURN

01 · Try before checking

Why is “Everyone believes it” insufficient?

One hint

Popularity describes agreement rather than justification.

Reveal and understand the solution

Agreement can arise from habit or shared error; relevant reasons and appropriate tests are still needed.

Compare method, conditions and answer; identify the exact part to revisit.

IMPROVE THROUGH PRACTICE

Three additional challenges with solutions

Start with the first challenge. Write your method before opening a hint; use the solution to find the first step that needs work.

Reflect after practising
02 · Recognise and understandLink to this exercise

Is a popular claim true because it is popular?

A hint to get started

Separate consensus from justification.

Step-by-step solution
  1. The number of believers is insufficient proof.
  2. Examine reasons, observations and methods.
  3. An informed consensus can matter without replacing justification.

Which step did you miss? Retry without help, then explain why the method works.

03 · Apply the methodLink to this exercise

How does refuting a theory differ from disliking it?

A hint to get started

A scientific objection concerns validity.

Step-by-step solution
  1. Refutation offers contradiction, a test or reasoned difficulty.
  2. Dislike expresses a personal reaction.
  3. It may motivate inquiry but cannot itself invalidate the theory.

Which step did you miss? Retry without help, then explain why the method works.

04 · Go furtherLink to this exercise

Why does a revisable theory not mean all opinions are equal?

A hint to get started

Revisability does not remove standards.

Step-by-step solution
  1. Theories are judged by coherence, evidence and explanatory power.
  2. Revision allows justified improvement.
  3. It does not erase differences in evidential strength.

Which step did you miss? Retry without help, then explain why the method works.

The trap to avoid

Methodical doubt differs from rejecting every piece of evidence.

Without notes, can you…

  • Explain the principle in your own words?
  • Rebuild the diagram and its connections?
  • Solve the exercise and justify the method?

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