You have a point but I forgot we were going back to Alchemy and before.<p>Phlogiston theory was overturned but the idea of oxygen is still standing strong despite the major advances in chemistry since 1773.  Other puzzle pieces have been placed around it but they&#x27;re additions to it.  Even if the universe turns out to be a hologram the idea of oxygen will survive.<p>Once the big puzzle pieces are found they&#x27;re rarely removed.  Since the big shift towards empiricism most &quot;revolutions&quot; and paradigm shifts are happening in new areas or at different scales than the old ones.  Much of what are being called revolutions I would call explorations of the unknown.