A machine is given a declaration it cannot apply, and the board names it,
says 'failed' rather than 'error', and shows the host's own words about what it
could not do — a board that said only 'failed' would send a person to ask the
thing they opened the board to avoid asking.
And it agrees with the command, from the same read: two answers to 'which
machine is broken' would be worse than either alone. Reading it changes
nothing.