Comment by tstrimple

Humans have created models for things they don't understand throughout human history. Certainly throughout any recorded history. We don't know, but we have a model that fits pretty well and we can guess at the underlying causes. We'll be wrong more often than right, but over time as we get more data and we can test more things, we get a more accurate model. Not necessarily the right model. We may never get that. But based on those models, "guesses" are far more reliable than "The Sun is a god who circles the world".

While we don't "know" how gravity works we can explain it and model it much more accurately now than when logos was the explanation. Providing those details is far more useful than a simple "we don't know."