Re: Image mode

[Richard Stallman]

    The problem with 4, as I see it, is that the user may not notice the
    file is in image-minor-mode.  Typing C-c C-c could then lead to
    unexpected behavior.

    I think, if we go with autodetection at all, it is better to ask the
    user in the event of any confusion, rather than using
    image-minor-mode.

That is a valid argument.  I think it leads to the conclusion that
when the file is recognized with some other mode, it should not be
recognized as an image too.