Thats not how anything in science works. You should be able to express your beliefs without having absolute proof and get fined if a court doesn't agree with you.
You never even need to engage with the question of whether something is fraud when disputing something.
If you say that there are 75 million people living in Germany I don’t need to call you a lier or a fraud to say that you are wrong and dispute your statement. That‘s just not necessary. I can just point at this website https://www.destatis.de/EN/Themes/Society-Environment/Popula... and say you are wrong. What do I care whether you simply misremembered, go wrong information from someone else and believed them or are actively lying.
Welcome to the scientific community.