[Monotone-devel] Why does "ls unknown" care about missing files?

[Glen Ditchfield]

[~]$ monotone ls missing bin
bin/myweblint
[~]$ monotone ls ignored bin
monotone: warning: missing bin/myweblint
monotone: misuse: 1 missing files
[~]$ monotone ls unknown bin
monotone: warning: missing bin/myweblint
monotone: misuse: 1 missing files
[~]$ monotone --version
monotone 0.19 (base revision: 168adf9537ff136c9b7fe7faad5991f92859390d)

Why does monotone insist that I do something about the missing files before it 
will tell me what is unknown or ignored?  Wouldn't those subcommands help me 
track down missing files that have been renamed?