Sum: Forty Tales from the Afterlives message of the book is the importance of exploring new ideas beyond the ones that have been traditionally passed down. The title word "Sum" refers to the Latin for "I am," as in "Cogito ergo sum". Like Italo Calvino's "Invisible Cities", "Sum" does not fit entirely into the traditional category of a novel. "Sum" has been called "philosofiction", an "experimental novel", and "a collection of thought experiments". Most of the stories are understood to "posit the afterlife as mirroring life on Earth" The New York Times Book Review called Sum a "delightful, thought-provoking little collection [which] belongs to that category
Cogito (software) on a Cogito managed repository. Conversely, most Cogito commands can be used on repositories primarily managed by Git or StGIT. Cogito is implemented as a set of Bash scripts (unlike Git, which is written mostly in C and portable Unix shell). As of April 2007 the project is stalled and declared "for sale", because a lot of the functionality has already been taken over by git, and the maintainer, Petr Baudiš, decided it would be better to focus on improving git-core. Cogito is released under the GNU GPL. As of May 2008, Cogito does not work well with recent Git