I think it's not so much that the Higgs was logical; the difference with Higgs is that the Higgs was conceived as something testable from the start (I'm assumin

I think it's not so much that the Higgs was logical; the difference with Higgs is that the Higgs was conceived as something testable from the start (I'm assuming, but it doesn't seem like a big leap, considering that particle physics has always been driven by experiments). The really big problem with untestable ideas is that they are not even science. Untestable ideas about physics are more like a peculiarly abstruse art form practiced by physicists.