Accessibility is not binary. There are degrees of accessibility. A PDF
document may be excellent for a person with low-vision, but terrible for a
screen reader user.

Here's another consideration: when PDF files are opened in Internet Explorer,
keyboard-only navigation goes to pot. Alt + left arrow no longer goes back to
the previous page, and choosing items from menus using the keyboard becomes
difficult or impossible. (I am not sure what happens in other browsers.)

Alan

> Some colleagues of mine are having a spirited discussion on whether a PDF
file is considered as an alternate format for
> individuals with print disabilities.
> I am curious about what  folks here consider as  alternate formats, and
whether a PDF file falls into their definition?
> Thanks,
> Jennison