[danbruc]

Final thought for tonight. It is certainly an extremely weak argument because it is root in intuition from our macroscopic world, but based on this it makes sense that elementary particles have to be points. At least for me it is somewhat hard to imagine how something could be spatially extended and elementary, i.e. not subdividable. If it has a length, an area, or a volume, I should be able to break it into pieces. This of course immediately conflicts with string theory with which I am sympathetic, sometimes more, sometimes less. But as said, it is an extremely weak argument rooted in a world many orders of magnitudes from where I want to apply it.