<p dir="ltr">On Oct 7, 2014 1:20 PM, "Dan" <<a href="mailto:danust2012@gmail.com">danust2012@gmail.com</a>> wrote:<br>
> <a href="http://www.nature.com/news/new-particle-is-both-matter-and-antimatter-1.16074">http://www.nature.com/news/new-particle-is-both-matter-and-antimatter-1.16074</a></p>
<p dir="ltr">There seems to be an unsubstantiated jump here.  Just because two electrons coordinate their spins, how does that make them into positrons?  They may have some characteristics that antimatter also possesses, such as "they exist", but these characteristics are also possessed by ordinary matter.</p>