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MIXORA CONCEPT

Soundness

The combination of a valid deductive structure and true premises.

thoughtStrong evidence
IN PLAIN LANGUAGE

A sound argument preserves truth and begins from truth, so its conclusion must be true. In everyday reasoning, premise truth can be the harder part to establish.

What “Strong evidence” means

The core definition or effect is well established across authoritative standards, foundational research or a broad research literature. The label does not make every practical prediction certain.

Marker-board illustration created specifically to explain Soundness: The combination of a valid deductive structure and true premises.VISUAL EXPLANATION · MARKER BOARD
The combination of a valid deductive structure and true premises.
EXAMPLE

All mammals are warm-blooded; whales are mammals; therefore whales are warm-blooded is both valid and based on true premises.

COMMON CONFUSION

A sound argument is stronger than a merely valid argument.

ASK YOURSELF

Have both the structure and the factual premises been checked?

RELATED CONCEPTS
thoughtValidity

For a deductive argument, the property that true premises could not occur together with a false conclusion.

→thoughtPremise

A statement offered as a reason for accepting a conclusion.

→thought × bridgeEvidence

Information that raises, lowers or otherwise constrains rational confidence in a claim.

→

SOURCES & TRUST

References

Last reviewed

  1. 01
    Informal Logic

    Leo Groarke · Stanford Encyclopedia of Philosophy

    Evaluation of real-world arguments, premise acceptability and inference quality.
    Reference source
What the source labels mean
Primary source
Original work, experiment, standard or historical text.
Academic source
Scholarly research or review published for an academic audience.
Reference source
An expert standard, encyclopedia or institutional explanation that summarizes a field.
General reference
A practical specialist resource useful for application, but not treated as decisive research by itself.