The solutions for the wedge loaded by a concentrated couple al ifs ver
tex, known as the Carothers-Sternberg-Koiter problem, are examined cri
tically. The cause of the divergence are terms which are fundamental s
elf-equilibrated solutions with unbounded energy arising from the eige
nvalues of the wedge and with exponent depending on the angle. The ''p
aradox'' occurs al the angle at which the term of the (angle-independe
nt exponent) r(-2) stress singularity is superseded by the next eigenv
alue. These terms are conjectured to be the weight functions of the we
dge. The breaking down of St. Venant's principle for the wedge in conn
ection with these terms is also demonstrated. As for the definition of
a concentrated couple, it can only exist if the limiting solutions ar
e independent of the path of loading (stable node);for wedge angles bi
gger than a half-space, they depend on the path of loading and the loa
dings that give path independence are characterized.