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MIXORA CONCEPT

Validity

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

thoughtStrong evidence
IN PLAIN LANGUAGE

Validity concerns the connection between premises and conclusion, not whether the premises are actually true. It asks whether the form preserves truth.

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 Validity: For a deductive argument, the property that true premises could not occur together with a false conclusion.VISUAL EXPLANATION · MARKER BOARD
For a deductive argument, the property that true premises could not occur together with a false conclusion.
EXAMPLE

All birds are glass; sparrows are birds; therefore sparrows are glass is valid in form but has a false premise.

COMMON CONFUSION

Valid does not mean factually correct, persuasive or morally acceptable.

ASK YOURSELF

Can you imagine the premises all true while the conclusion is false?

RELATED CONCEPTS
thoughtSoundness

The combination of a valid deductive structure and true premises.

→thoughtDeductive reasoning

Reasoning intended to make the conclusion necessary if the premises are true.

→thoughtPremise

A statement offered as a reason for accepting a conclusion.

→thoughtConclusion

The claim an argument asks you to accept on the basis of its premises.

→

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.