With the Bourne shell family, it is simple to redirect standard output and standard error separately. This makes it easy to save or discard error messages selectively. With the C-Shell family,...

With the Bourne shell family, it is simple to redirect standard output and standard error separately. This makes it easy to save or discard error messages selectively. With the C-Shell family, separating the two types of output is much more complex. How important is this? The C-Shell was designed by Bill Joy, a brilliant programmer in his day. Why do you think he created such a complicated system?