Почему удаление деинсталляции удаляет aptitude и libreoffice?

Когда я делаю sudo apt-get remove 'libboost*' в Ubuntu 14.04, я получаю следующий ответ:

      The following packages will be REMOVED:
      aptitude libboost-atomic1.54.0 libboost-chrono1.54.0 libboost-context1.54.0
      libboost-date-time1.54.0 libboost-filesystem1.54.0
      libboost-graph-parallel1.54.0 libboost-graph1.54.0 libboost-iostreams1.54.0
      libboost-locale1.54.0 libboost-log1.54.0 libboost-math1.54.0
      libboost-mpi-python1.54.0 libboost-mpi1.54.0 libboost-program-options1.54.0
      libboost-python1.54.0 libboost-random1.54.0 libboost-regex1.54.0
      libboost-serialization1.54.0 libboost-signals1.54.0 libboost-system1.54.0
      libboost-system1.55.0 libboost-test1.54.0 libboost-thread1.54.0
      libboost-thread1.55.0 libboost-timer1.54.0 libboost-wave1.54.0 libcmis-0.4-4
      libconsole-bridge0.2 libdbus-cpp2 libfcl0 libmirclient7
      libmirclientplatform-mesa libogre-1.9.0 liborcus-0.6-0 libprocess-cpp1
      libqpidcommon2 libreoffice libreoffice-avmedia-backend-gstreamer
      libreoffice-base libreoffice-base-core libreoffice-base-drivers
      libreoffice-calc libreoffice-core libreoffice-draw libreoffice-gnome
      libreoffice-gtk libreoffice-impress libreoffice-math libreoffice-ogltrans
      libreoffice-pdfimport libreoffice-presentation-minimizer
      libreoffice-report-builder-bin libreoffice-sdbc-firebird
      libreoffice-sdbc-hsqldb libreoffice-writer libsslcommon2 libsslcommon2-dev
      libtorrent-rasterbar8 libubuntu-location-service0 libunity-scopes1
      liburdfdom-model-state0.2 liburdfdom-model0.2 liburdfdom-sensor0.2
      liburdfdom-world0.2 python3-uno qbittorrent unity-plugin-scopes
      unity-scope-mediascanner2 unity-scope-scopes unoconv

Почему он хочет удалить такие программы, как aptitude и libreoffice, и как я могу предотвратить это ?