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English Lexicon

Sound argument

/saʊnd ˈɑːr.ɡjə.mənt/
nounCEFR C1 (Advanced)Top #4500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A deductive argument that is both valid and has entirely true premises, thereby guaranteeing the absolute truth of its conclusion.

    "The defense attorney presented a sound argument that convinced the jury of her client's innocence."
  2. 2

    A logical reasoning process based on solid evidence and unassailable facts.

    "Economic analysts built a sound argument for immediate policy reform."
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Linguistic Origin & Historical Etymology

The term combines 'sound' from Old English 'sund' meaning healthy, whole, or secure, and 'argument' derived from Latin 'argumentum' via Old French, meaning an adduction of proof or reason. In philosophical and logical contexts, 'sound' acquired its specific technical sense by the late 20th century to designate a deductive argument that is both valid in its form and true in its premises.

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