1. Information or statements whose accuracy, validity, or truthfulness is doubtful or open to dispute
The journalist refused to publish the article because it contained questionable facts that could not be verified.
O jornalista recusou publicar o artigo porque continha fatos questionáveis que não podiam ser verificados.
2. Claims or assertions that lack sufficient evidence or credible sources to support them
The politician's speech was filled with questionable facts that contradicted official records.
O discurso do político estava repleto de fatos questionáveis que contradiziam os registros oficiais.