We can use words to communicate effectively.
The capacity for language evolved in man, and it seems that the ideas corresponding to the parts of speech are innate - things (nouns) with features (adjectives) in relationships with one another (prepositions) act (verbs), and these parts of speech appear nearly universal, but the particular languages with their lexicons and grammars were invented.
I wrote, "An argument wouldn't be compelling to the scientific and educated lay community for a century-and-a-half if it were wrong." If it were wrong, it would be falsified.
What beliefs are those?
How does this relate? Nobody argued that hand washing was harmful. It just wasn't known to be helpful and it hadn't been tested because there had been no reason to suspect that there were living things on those hands that could kill.
They work for me and others. So does science. So does language.
What does that mean? Exactly alike? No, they won't. But they'll still be thinking in nouns and verbs, they'll still be doing math, and they'll still believe that life evolved on earth.