1. reasoning or argumentation that lacks a solid basis in fact, evidence, or valid principles; faulty reasoning without proper foundation
His argument was based on unfounded logic that ignored statistical evidence.
Seu argumento foi baseado em lógica infundada que ignorava evidências estatísticas.
2. a chain of reasoning that appears logical on the surface but is built on false or unproven premises
The theory relied on unfounded logic and was quickly discredited by the scientific community.
A teoria se baseava em lógica infundada e foi rapidamente descreditada pela comunidade científica.