A valid argument guarantees a true conclusion if the premises are true. While this is true in formal terms, in practice, the concept of validity only ensures that the conclusion follows the logical structure of the premises, not that it is necessarily "true" in an absolute sense. For example, if we accept the premises "All unicorns are magical creatures" and "My pet is a unicorn," the conclusion "My pet is a magical creature" would be valid, but not true in the real world. Which already calls into question the veracity of what you are talking about.