Indeed. Asking a blind person if air is a provable concept can be quite revealing-- a blind person has no doubts at all air is real.<quoted text>
Agreed. Besides that, we have five senses, not just one. Air is the medium that conveys light and sound as well as aroma. We can feel it as it passes over our skins and tousles our hair. We can hear it as it rustles leaves.
We also use it to move boats over the water and compress it to support our cars and power air tools. We capture its motion to create electricity.
If any deity were as evident as air, there would be no reason for doubt.
The old phrase "seeing is believing" sometimes has the effect on some folk, that seeing is the *only* sense that counts.