Whether the screen reports a failure rather than disclosing the next word.

A pure disclosure level is guidance: --help may relocate it to stdout and exit 0. A diagnostic — an unreadable package, a misspelled coder, a listing that could not be produced — is a failure that happens to be explained well, and stays on stderr with a non-zero exit whatever the flags say, so that binstruct nosuchpkg --help > out.txt cannot report success.