In Venezuela there is apparently a new definition of "coup."
"Mayoría es mayoría y debe respetarse en democracia, no se pueden buscar emboscadas, inventos para vulnerar la soberanía popular (...) eso sólo tiene un nombre: golpismo. Quien pretende vulnerar la mayoría en la democracia lo que está es llamando a un golpe", dijo durante el discurso que pronunció Maduro en el acto de proclamación ante el Consejo Nacional Electoral (CNE).
So a "coup" refers to questioning the majority, and that includes asking for a recount. We can hark back to the famous Federalist 10, written by James Madison:
Complaints are everywhere heard from our most considerate and virtuous citizens, equally the friends of public and private faith, and of public and personal liberty, that our governments are too unstable, that the public good is disregarded in the conflicts of rival parties, and that measures are too often decided, not according to the rules of justice and the rights of the minor party, but by the superior force of an interested and overbearing majority.
Henrique Capriles may have no case. But asking for a recount is reasonable, whereas the idea that merely asking for it equates to trying to overthrow the government is not.