Debian – What values from debconf-get-selections should not be preseeded

I want to replicate the Debian installation choices made for my system's current configuration in the installation of a new system.

Debian can be pre-configured through a "pre-configuration" (aka "preseed") file, which basically contains the answers to the questions the installer will ask.

The documentation states that one way to create a preconfiguration file from an existing installation of Debian is to:

…use the debconf-get-selections from the debconf-utils package to dump both the debconf database and the installer's cdebconf database to a single file:

$ debconf-get-selections --installer > file
$ debconf-get-selections >> file

But it then immediately adds:

However, a file generated in this manner will have some items that should not be preseeded…

The documentation does not elaborate on what those items-that-should-not-be-preseeded would be.

Could someone elaborate?

By way of illustration, below I include the second field of the output I get from the two commands above, where I've kept only the lines that begin with d-i, along with the comments, sometimes truncated for brevity. (The reason for keeping only the configuration lines that begin with d-i is that in the example pre-configuration file provided by Debian, only such lines appear.)

# Check the integrity of another CD-ROM?
cdrom-checker/nextcd

# Web server started, but network not running
save-logs/no_network

# for internal use only
debian-installer/consoledisplay

debian-installer/shell-plugin

# Country, territory or area:
# Choices: Antigua and Barbuda, Australia, Botswana, Canada, ...
localechooser/shortlist

# for internal use; can be preseeded
preseed/include_command

# Country of origin for the keyboard:
# Choices: 
keyboard-configuration/layout

# Choices: Canada, Mexico, Saint Pierre and Miquelon, United ...
localechooser/countrylist/North_America

# Choices: Greece, Cyprus, other
localechooser/shortlist/el

# Keyboard layout:
# Choices: 
keyboard-configuration/variant

# Choices: Algeria, Angola, Benin, Botswana, Burkina Faso, Bu...
localechooser/countrylist/Africa

# Choices: Finland, Sweden, other
localechooser/shortlist/sv

# Keep default keyboard options ()?
keyboard-configuration/unsupported_options

# Choices: Cyprus, Turkey, other
localechooser/shortlist/tr

# Interactive shell
di-utils-shell/do-shell

# for internal use only
# Choices: stable, testing, unstable
cdrom/suite

# Choose an installation step:
# Choices: 
debian-installer/missing-provide

# Check CD-ROM integrity?
cdrom-checker/start

# Failed to retrieve the preconfiguration file
preseed/retrieve_error

# Directory in which to save debug logs:
save-logs/directory

# for internal use only
debconf/showold

# Failed to open checksum file
cdrom-checker/md5file_failed

# Choices: Andorra, Spain, France, Italy, other
localechooser/shortlist/ca

# Write the changes to the storage devices and configure RAID...
partman-md/confirm_nooverwrite

# PCMCIA resource range options:
hw-detect/pcmcia_resources

# Failed to mount the floppy
save-logs/floppy_mount_failed

# for internal use only
debconf/language

# Choices: China, Singapore, Taiwan, Hong Kong, other
localechooser/shortlist/zh_TW

# Dummy template for preseeding unavailable questions
debian-installer/dummy

# Additional parameters for module :
hw-detect/retry_params

# Incorrect CD-ROM detected
cdrom-detect/wrong-cd

# for internal use; can be preseeded
cdrom-detect/eject

# Choices: Argentina, Bolivia, Chile, Colombia, Costa Rica, E...
localechooser/shortlist/es

# for internal use; can be preseeded
preseed/run

# Write the changes to disks and configure LVM?
partman-lvm/confirm_nooverwrite

# Cannot save logs
save-logs/bad_directory

# Choices: Belgium, Canada, France, Luxembourg, Switzerland, ...
localechooser/shortlist/fr

# Insufficient memory
lowmem/insufficient

# for internal use
keyboard-configuration/optionscode

# Choices: China, Taiwan, Singapore, Hong Kong, other
localechooser/shortlist/zh_CN

# Load missing firmware from removable media?
hw-detect/load_firmware

# Choices: Italy, Switzerland, other
localechooser/shortlist/it

# Choices: Antarctica
localechooser/countrylist/Antarctica

# Choose the next step in the install process:
# Choices: Choose language, Configure the speech synthesizer ...
debian-installer/main-menu

# Failed to load installer component
anna/install_failed

# Choices: Russian Federation, Ukraine, other
localechooser/shortlist/ru

# for internal use
keyboard-configuration/modelcode

# Entering low memory mode
lowmem/low

# Choices: Jordan, United Arab Emirates, Bahrain, Algeria, Sy...
localechooser/shortlist/ar

# Keep current keyboard options in the configuration file?
keyboard-configuration/unsupported_config_options

# Choices: Antigua and Barbuda, Australia, Botswana, Canada, ...
localechooser/shortlist/en

# Method for toggling between national and Latin mode:
# Choices: Caps Lock, Right Alt (AltGr), Right Control, Right...
keyboard-configuration/toggle

# for internal use only
anna/retriever

# Choices: Curaçao
localechooser/countrylist/other

# Choices: Albania, Andorra, Armenia, Austria, Azerbaijan, Be...
localechooser/countrylist/Europe

# locale
localechooser/help/locale

# Load CD-ROM drivers from removable media?
cdrom-detect/load_media

# for internal use; can be preseeded
debian-installer/framebuffer

# for internal use
espeakup/voice

# for internal use; can be preseeded
preseed/include

# Error reading Release file
cdrom-detect/no-release

# Ignore questions with a priority less than:
# Choices: critical, high, medium, low
debconf/priority

# Key to function as AltGr:
# Choices: The default for the keyboard layout, No AltGr key,...
keyboard-configuration/altgr

# CD-ROM detected
cdrom-detect/success

# Choices: Bouvet Island, Falkland Islands (Malvinas), Saint ...
localechooser/countrylist/Atlantic_Ocean

# Continue the install without loading kernel modules?
anna/no_kernel_modules

# for internal use; can be preseeded
debian-installer/exit/poweroff

# Choices: Bangladesh, India, other
localechooser/shortlist/bn

# for internal use; can be preseeded
preseed/include/checksum

# Integrity test failed
cdrom-checker/mismatch

# Load missing drivers from removable media?
hw-detect/load_media

# Keep default keyboard layout ()?
keyboard-configuration/unsupported_layout

# Start PC card services?
hw-detect/start_pcmcia

# for internal use; can be preseeded
debian-installer/add-kernel-opts

# for internal use; can be preseeded
mouse/protocol

# for internal use; can be preseeded
mouse/left

# for internal use
keyboard-configuration/layoutcode

# for internal use
keyboard-configuration/store_defaults_in_debconf_db

# Choices: Brazil, Portugal, other
localechooser/shortlist/pt

# for internal use; can be preseeded
preseed/early_command

# for internal use only
debian-installer/exit/always_halt

# Choices: Africa, Antarctica, Asia, Atlantic Ocean, Caribbea...
localechooser/continentlist

# Insert Debian boot CD-ROM
cdrom-checker/firstcd

# How should the debug logs be saved or transferred?
# Choices: floppy, web, mounted file system
save-logs/menu

# for internal use; can be preseeded
rescue/enable

# for internal use only
cdrom-detect/cdrom_fs

# Insert formatted floppy in drive
save-logs/insert_floppy

# Translations temporarily not available
localechooser/translation/none-yet

# Keymap to use:
# Choices: American English, Albanian, Arabic, Asturian, Bang...
keyboard-configuration/xkb-keymap

# for internal use; can be preseeded
mouse/device

# for internal use only
cdrom-detect/hybrid

# for internal use only
debconf/translations-dropped

# Country to base default locale settings on:
# Choices: Antigua and Barbuda${!TAB}-${!TAB}en_AG, Australia...
localechooser/preferred-locale

# Choices: Spain, France, other
localechooser/shortlist/eu

# Choices: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuad...
localechooser/countrylist/South_America

# Failed to mount CD-ROM
cdrom-checker/mntfailed

# Retry mounting the CD-ROM?
cdrom-detect/retry

# Choices: Serbia, Montenegro, other
localechooser/shortlist/sr

# Module needed for accessing the CD-ROM:
# Choices: 
cdrom-detect/cdrom_module

# for internal use; can be preseeded
preseed/file

# for internal use; can be preseeded
hw-detect/load-ide

# for internal use; can be preseeded
preseed/interactive

# Installation step failed
debian-installer/main-menu/item-failure

# Error while running ''
hw-detect/modprobe_error

# Choices: Pakistan, India, other
localechooser/shortlist/pa

# Use Control+Alt+Backspace to terminate the X server?
keyboard-configuration/ctrl_alt_bksp

# Choices: China, India, other
localechooser/shortlist/bo

# Language:
# Choices: C${!TAB}-${!TAB}No localization, Albanian${!TAB}-$...
localechooser/languagelist

# Installer components to load:
# Choices: 
anna/choose_modules_lowmem

# for internal use only
debian-installer/language

# for internal use
keyboard-configuration/variantcode

# Choices: Anguilla, Antigua and Barbuda, Aruba, Bahamas, Bar...
localechooser/countrylist/Caribbean

# Language selection no longer possible
localechooser/translation/no-select

# Failed to copy file from CD-ROM. Retry?
retriever/cdrom/error

# Choices: Afghanistan, Bahrain, Bangladesh, Bhutan, Brunei D...
localechooser/countrylist/Asia

# Write the changes to disk and configure encrypted volumes?
partman-crypto/confirm_nooverwrite

# for internal use; can be preseeded
debian-installer/country

# No valid Debian CD-ROM
cdrom-checker/wrongcd

# Choices: Belgium, Germany, Liechtenstein, Luxembourg, Austr...
localechooser/shortlist/de

# for internal use; can be preseeded
anna/standard_modules

# Failed to process the preconfiguration file
preseed/load_error

# for internal use; can be preseeded
preseed/file/checksum

# Device file for accessing the CD-ROM:
cdrom-detect/cdrom_device

# for internal use; can be preseeded
directfb/hw-accel

# for internal use; can be preseeded
debian-installer/allow_unauthenticated

# Continue the installation in the selected language?
localechooser/translation/warn-severe

# for internal use; can be preseeded
debian-installer/theme

# Choices: American Samoa, Australia, Cook Islands, Fiji, Fre...
localechooser/countrylist/Oceania

# Are you sure you want to exit now?
di-utils-reboot/really_reboot

# Choices: Brazil, Portugal, other
localechooser/shortlist/pt_BR

# for internal use only
debconf/frontend

# for internal use; can be preseeded
debian-installer/exit/halt

# Choices: Belize, Costa Rica, El Salvador, Guatemala, Hondur...
localechooser/countrylist/Central_America

# Keep the current keyboard layout in the configuration file?
keyboard-configuration/unsupported_config_layout

# Compose key:
# Choices: No compose key, Right Alt (AltGr), Right Control, ...
keyboard-configuration/compose

# Method for temporarily toggling between national and Latin ...
# Choices: No temporary switch, Both Logo keys, Right Alt (Al...
keyboard-configuration/switch

# Installer components to load:
# Choices: cfdisk-udeb: Manually partition a hard drive (cfdi...
anna/choose_modules

# Integrity test successful
cdrom-checker/passed

# Manually select a CD-ROM module and device?
cdrom-detect/manual_config

# Terminal plugin not available
debian-installer/terminal-plugin-unavailable

# Insert a Debian CD-ROM
cdrom-checker/askmount

# Additional locales:
# Choices: aa_DJ.UTF-8, aa_DJ, aa_ER, aa_ER@saaho, aa_ET, af_...
localechooser/supported-locales

# for internal use only
cdrom-detect/usb-hdd

# for internal use; can be preseeded
preseed/late_command

# Failed to run preseeded command
preseed/command_failed

# Modules to load:
# Choices: 
hw-detect/select_modules

# Keyboard model:
# Choices: 
keyboard-configuration/model

# Continue the installation in the selected language?
localechooser/translation/warn-light

# Choices: Aruba, Belgium, Netherlands, other
localechooser/shortlist/nl

# for internal use only
cdrom/codename

# Choices: British Indian Ocean Territory, Christmas Island, ...
localechooser/countrylist/Indian_Ocean

# for internal use; can be preseeded
preseed/boot_command

# Web server started
save-logs/httpd_running

# System locale:
# Choices: 
debian-installer/locale

# Choices: Macedonia\, Republic of, Albania, other
localechooser/shortlist/sq

# Country of origin for the keyboard:
# Choices: 
keyboard-configuration/layout

# Keymap to use:
# Choices: American English, Albanian, Arabic, Asturian, Bang...
keyboard-configuration/xkb-keymap

# Keyboard layout:
# Choices: English (US), English (US) - Cherokee, English (US...
keyboard-configuration/variant

# Keep default keyboard options ()?
keyboard-configuration/unsupported_options

# Use Control+Alt+Backspace to terminate the X server?
keyboard-configuration/ctrl_alt_bksp

# for internal use
keyboard-configuration/variantcode

# for internal use
keyboard-configuration/optionscode

# for internal use
keyboard-configuration/modelcode

# Keep current keyboard options in the configuration file?
keyboard-configuration/unsupported_config_options

# Keep the current keyboard layout in the configuration file?
keyboard-configuration/unsupported_config_layout

# Method for toggling between national and Latin mode:
# Choices: Caps Lock, Right Alt (AltGr), Right Control, Right...
keyboard-configuration/toggle

# Compose key:
# Choices: No compose key, Right Alt (AltGr), Right Control, ...
keyboard-configuration/compose

# Method for temporarily toggling between national and Latin ...
# Choices: No temporary switch, Both Logo keys, Right Alt (Al...
keyboard-configuration/switch

# Key to function as AltGr:
# Choices: The default for the keyboard layout, No AltGr key,...
keyboard-configuration/altgr

# Keep default keyboard layout ()?
keyboard-configuration/unsupported_layout

# Keyboard model:
# Choices: A4Tech KB-21, A4Tech KBS-8, A4Tech Wireless Deskto...
keyboard-configuration/model

# for internal use
keyboard-configuration/layoutcode

# for internal use
keyboard-configuration/store_defaults_in_debconf_db