1. Principles or fundamental beliefs that lack factual basis, evidence, or logical foundation
The theory was built on groundless principles that were later disproven by scientific research.
A teoria foi construída sobre princípios infundados que foram posteriormente refutados pela pesquisa científica.
2. Assumptions or core beliefs without valid justification or supporting evidence
His arguments were based on groundless principles with no empirical support.
Seus argumentos eram baseados em princípios infundados sem suporte empírico.