It is another way of calling a paradox, a "problem without solution". It comes from the Greek 945; 960; 959; 961; 953; 945; ( aporía "dead end, difficulty in passing") .
aporia:Dificultad to pasar.dicese of the arguments that cannot be resolved.
Take advantage of the difficulties of others.
( gr aporia ) its sense etimologico " path without exit " He has led par aaplicarlo to the difficulties of thinking which does not offer a satisfactory logic solution