Asking not to be downvoted seems juvenile and might attract downvotes.
If a literal NULL is provided as check_expression and no replacement_value is provided, returns an int. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?
The nitty gritty: We reserve the right to cancel membership at any time so please be nice to people you make contact with.
This glossary includes the content from the ISOGG DNA Newbie Glossary which was previously published on the main ISOGG website (for reference see the version preserved in the Internet Archive in August 2014).
We hope that these changes will be completed soon and apologise something weird happens ...