invalid premise
[ɪnˈvælɪd ˈpremɪs]
noun phrasepl: invalid premises
premissa inválida
1. A foundational assumption or proposition in an argument that is false, flawed, or logically unsound, thereby undermining the validity of any conclusion drawn from it
The argument that all birds can fly is based on an invalid premise, since penguins are birds but cannot fly.
O argumento de que todos os pássaros podem voar é baseado em uma premissa inválida, já que os pinguins são pássaros mas não conseguem voar.
2. In logic and formal reasoning, a statement that fails to establish a necessary or sufficient condition for the conclusion being argued
The lawyer's case collapsed because the prosecution built its argument on an invalid premise.
O caso do advogado desabou porque a acusação construiu seu argumento sobre uma premissa inválida.
This term is primarily used in formal academic, legal, and philosophical contexts in both Brazil and the USA. It is not commonly used in casual conversation. In Brazilian universities and courts, 'premissa inválida' is standard terminology for logical analysis and debate. The concept is fundamental to critical thinking education and is often taught as part of logic and argumentation courses.
Related Idioms & Phrases
built on an invalid premise
the whole argument rests on an invalid premise
fundamentally flawed premise
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