on disabling drivers that use non-Free firmware

[Richard M Stallman]

    > Those are not similar cases.  None of them _requires_ a
    > non-free program in order to run at all.

    The drivers don't, either.  They just won't do anything useful.

You have shown that I didn't make my words mathematically clear.
I should have said,

    Those are not similar cases.  None of them _requires_ a
    non-free program in order to run and provide their
    functionality.