CogKnoSys

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Mental

Evaluating Evidence

Evaluating evidence means judging how well information actually supports a claim before accepting a conclusion.

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The idea

Evidence for a claim is whatever supports it, usually by indicating that the claim is true. Evaluating evidence means judging how well that support really holds up before you accept a conclusion. It is a core part of critical thinking, which means analyzing facts, evidence, observations and arguments to reach sound conclusions.

Different fields treat evidence in different ways. In science, evidence is information gathered through the scientific method that supports or counts against a hypothesis. For example, measurements of Mercury's unusual orbit are seen as evidence for Einstein's general relativity. In law, evidence includes testimony, documents and physical objects used to prove or disprove claims in a case.

Evidence can be weak or strong, ranging from a loose link to proof nobody can dispute. One useful test is to ask whether the evidence makes the claim more likely to be true. Careful thinkers also ask where information came from, how it was collected and whether other sources agree. They try to spot hidden assumptions and to compare other points of view fairly.

Check yourself

Question 1 of 2

Measurements of Mercury's unusual orbit are seen as evidence for which theory?

Pick one. The first pick counts.

Composition

what it's made of

  • Source — Who produced the information and whether they were in a position to know.
  • Method — How the information was gathered, such as a careful experiment or a casual guess.
  • Strength — How strongly the evidence supports the claim, from weak correlation to indisputable proof.
  • Agreement — Whether other independent evidence points the same way.
  • Assumptions — Unstated ideas that must be true for the evidence to support the conclusion.

Connection

how it relates

Under Critical Thinking

Related

  1. Inductive Reasoningstrength 70 of 100

    Inductive reasoning turns evidence into likely conclusions, so the quality of the evidence decides how strong they are.

  2. Logical Fallaciesstrength 60 of 100

    Many fallacies, such as hasty generalization, draw more from the evidence than it can support.

  3. Deductive Reasoningstrength 50 of 100

    A deductive argument is only as good as its premises, and checking the evidence for them is part of judging it.

Change

how and why it evolves

Past
Philosophers in the 20th century started to study the evidential relation, the link between a piece of evidence and the claim it supports.
Now
Today scientists treat evidence as a neutral judge between competing theories, while students learn to check online sources before trusting them.
Next
As AI tools make realistic fake images and text easier to produce, skills for weighing evidence will likely matter even more.

Knowledge you can walk. Read the idea, then step up, across or down.

Evaluating Evidence

Evaluating evidence means judging how well information actually supports a claim before accepting a conclusion.

Learn, discuss, create, buy or invest

The idea

Evidence for a claim is whatever supports it, usually by indicating that the claim is true. Evaluating evidence means judging how well that support really holds up before you accept a conclusion. It is a core part of critical thinking, which means analyzing facts, evidence, observations and arguments to reach sound conclusions.

Different fields treat evidence in different ways. In science, evidence is information gathered through the scientific method that supports or counts against a hypothesis. For example, measurements of Mercury's unusual orbit are seen as evidence for Einstein's general relativity. In law, evidence includes testimony, documents and physical objects used to prove or disprove claims in a case.

Evidence can be weak or strong, ranging from a loose link to proof nobody can dispute. One useful test is to ask whether the evidence makes the claim more likely to be true. Careful thinkers also ask where information came from, how it was collected and whether other sources agree. They try to spot hidden assumptions and to compare other points of view fairly.

Check yourself

2 quick questions, instant feedback.