Yes, that's correct. To fix the first problem, and for clarity, here's
a revised proposal for the entire text:

===

For all release-blocking desktop / arch combinations, the following
applications must start successfully and withstand a basic
functionality test:

* web browser
* file manager
* package manager
* image viewer
* document viewer
* text editor
* archive manager
* terminal emulator
* problem reporter
* help viewer
* system settings

If there are multiple applications of the same type (e.g. several web
browsers), the primary/default one must satisfy the requirements. If
the primary/default application can't be determined, at least one of
said applications must satisfy the requirements.

Additionally, for Fedora Workstation on the x86_64 architecture,
'''all''' applications installed by default which can be launched from
the Activities menu must meet this requirement.

All applications installed by default in Fedora Workstation must comply
with each MUST and MUST NOT guideline in the Applications and Launchers
policy.

===