Non-focusable ARIA role="button" nesting non-focusable ARIA role="button" (no presentational roles conflict resolution, since inner button is not focusable)

Focusable ARIA role="button" nesting non-focusable ARIA role="button" (no presentational roles conflict resolution, since inner button is not focusable)

Non-focusable ARIA role="button" nesting focusable ARIA role="button" (presentational roles conflict resolution arise, since inner button is focusable)

Focusable ARIA role="button" nesting focusable ARIA role="button" (presentational roles conflict resolution arise, since inner button is focusable)

HTML button nesting HTML button

HTML input with role="none" (presentational roles conflict resolution)

HTML input with role="none" and disabled (presentational roles conflict resolution does not apply due to disabled attr)

HTML input with role="none" and readonly (presentational roles conflict resolution)

HTML input with role="none", disabled and readonly (presentational roles conflict resolution does not apply due to disabled attr)