unsound deduction
[/ʌnˈsaʊnd dɪˈdʌkʃən/]
nounpl: unsound deductions
dedução falha
1. A logical conclusion that does not follow validly from its premises; reasoning that violates the rules of formal logic or contains logical fallacies
The argument that 'all birds can fly, penguins are birds, therefore penguins can fly' is an unsound deduction based on an incorrect premise.
O argumento de que 'todos os pássaros voam, pinguins são pássaros, portanto pinguins voam' é uma dedução falha baseada em uma premissa incorreta.
2. A conclusion reached through faulty reasoning, incorrect logic, or invalid inference
His unsound deduction led to a flawed business strategy that ultimately failed.
Sua dedução falha levou a uma estratégia comercial deficiente que finalmente fracassou.
The term is primarily used in academic, philosophical, and legal contexts in both Brazil and the USA. In educational settings, understanding the difference between sound and unsound deduction is fundamental to teaching critical thinking and logic. The phrase is formal and technical, commonly appearing in philosophy courses, law school arguments, and scientific discourse.
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