I happily grant that some effects are mensurate but we don't yet know the physical cause of the effect in question. So what? Science is, by its very nature, provisional. If we find an effect without a cause, even after we've examined 'all known physical factors', it simply means that there's a physical factor we don't know about (I know this sounds like scientism, but it really isn't).
A good example of this would be the perturbation in Mercury's orbit. For a distressingly long time, the only explanation was a planet closer to the Sun than Mercury, tentatively called 'Vulcan' - some people even claimed to have seen it. It wasn't until General Relativity allowed the possibility of a massive gravitational field generating secondary and (I think) tertiary fields that the wobbling of Mercury could be accounted for without another physical body in the mix. But that doesn't mean that gravity isn't physical. We can feel it, measure it, determine its effect on other things with a great degree of accuracy.
Boru
A good example of this would be the perturbation in Mercury's orbit. For a distressingly long time, the only explanation was a planet closer to the Sun than Mercury, tentatively called 'Vulcan' - some people even claimed to have seen it. It wasn't until General Relativity allowed the possibility of a massive gravitational field generating secondary and (I think) tertiary fields that the wobbling of Mercury could be accounted for without another physical body in the mix. But that doesn't mean that gravity isn't physical. We can feel it, measure it, determine its effect on other things with a great degree of accuracy.
Boru
‘I can’t be having with this.’ - Esmeralda Weatherwax
